This map shows the geographic impact of W. D. Ehmann's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by W. D. Ehmann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites W. D. Ehmann more than expected).
This network shows the impact of papers produced by W. D. Ehmann. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by W. D. Ehmann. The network helps show where W. D. Ehmann may publish in the future.
Co-authorship network of co-authors of W. D. Ehmann
This figure shows the co-authorship network connecting the top 25 collaborators of W. D. Ehmann.
A scholar is included among the top collaborators of W. D. Ehmann based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with W. D. Ehmann. W. D. Ehmann is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Ehmann, W. D., William R. Markesbery, Carol Thompson, D. E. Vance, & Yanfang Mao. (1986). Studies of trace element imbalances in Alzheimer's disease using sequential NAA. Transactions of the American Nuclear Society. 53.
2.
Garg, A. N., et al.. (1977). The Distribution of Zr and HF in Lunar Minerals and Rock 12013. Lunar and Planetary Science Conference. 8. 346.1 indexed citations
3.
Gold, T., et al.. (1977). Chemical and optical properties at the Apollo 15 and 16 sites. Lunar Science Conference. 3. 3633–3643.4 indexed citations
4.
Ehmann, W. D., et al.. (1977). Zhamanshin Crater Glasses: Chemical Composition and Comparison with Tektites. Metic. 12. 212.10 indexed citations
5.
Ehmann, W. D., et al.. (1977). Chemical stratigraphy of the Apollo 17 deep drill cores 70009-70007. Lunar Science Conference. 3. 3223–3241.3 indexed citations
6.
Ehmann, W. D. & A. N. Garg. (1977). Zirconium-Hafnium Fractionation in Achondrites. Metic. 12. 211.1 indexed citations
7.
Fredriksson, K., et al.. (1977). The Zhamanshin Structure: Chemical and Physical Properties of Selected Samples. Metic. 12. 229.14 indexed citations
8.
Ehmann, W. D., et al.. (1976). Chemical characterization of lunar core 60009.. Lunar Science Conference. 1. 241–258.10 indexed citations
9.
Warner, R. D., K. Keil, A. V. Murali, et al.. (1976). Consortium investigation of breccia 67435.. Lunar and Planetary Science Conference Proceedings. 2. 2379–2402.12 indexed citations
10.
Ehmann, W. D., L. L. Chyi, A. N. Garg, et al.. (1975). Chemical studies of the lunar regolith with emphasis on zirconium and hafnium. Lunar Science Conference. 2. 1351–1361.11 indexed citations
11.
James, W. D., L. L. Chyi, & W. D. Ehmann. (1975). Oxygen and nitrogen in coal by INAA: implications for conversion. Transactions of the American Nuclear Society.2 indexed citations
12.
Ma, M.-S., et al.. (1974). Compositional studies of the lunar regolith at the Apollo 17 site. Lunar and Planetary Science Conference Proceedings. 2. 1079–1086.12 indexed citations
13.
Ehmann, W. D. & L. L. Chyi. (1974). Abundances of the group IVB elements, Ti, Zr, and Hf and implications of their ratios in lunar materials. Lunar and Planetary Science Conference Proceedings. 2. 1015–1024.3 indexed citations
14.
Chyi, L. L. & W. D. Ehmann. (1973). Zirconium and hafnium abundances in some lunar materials and implications of their ratios. Lunar and Planetary Science Conference Proceedings. 4. 1219.6 indexed citations
15.
Janghorbani, Morteza, et al.. (1973). Oxygen and other elemental abundance data for Apollo 14, 15, 16 and 17 samples. Lunar Science Conference. 4. 1115.7 indexed citations
16.
Janghorbani, Morteza, W. D. Ehmann, & Miller. (1973). Continuous analyzer based on neutron activation analysis and $sup 252$Cf neutron source theoretical developments. Transactions of the American Nuclear Society.1 indexed citations
17.
Ehmann, W. D., et al.. (1973). Elemental Abundance Studies of Lunar Samples with Particular Reference to Oxygen Abundances and the Zirconium/Hafnium Ratio. Lunar and Planetary Science Conference. 4. 212.1 indexed citations
18.
Ehmann, W. D. & John W. Morgan. (1970). Oxygen, silicon and aluminium in Apollo 11 rocks and fines by 14 MeV neutron activation. Geochimica et Cosmochimica Acta Supplement. 1. 1071.7 indexed citations
19.
Goleš, Gordon G., K. Randle, Masatoshi Osawa, et al.. (1970). Elemental abundances by instrumental activation analyses in chips from 27 lunar rocks. Geochimica et Cosmochimica Acta Supplement. 1. 1165.21 indexed citations
20.
Ehmann, W. D., et al.. (1965). THE NON-DESTRUCTIVE DETERMINATION OF SILICON AND OXYGEN IN METEORITES BY FAST NEUTRON ACTIVATION ANALYSIS. 1–16.2 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.