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| | Professor Howard Plotkin |
 | | "Edward C. Pickering, the Henry Draper Memorial, and the Beginnings of Astrophysics in America," Annals of Science, vol. |
 | | "Edward P. Henderson and the Development of Meteoritics at the Smithsonian Institution, 1929-1965," Meteoritical Society, Washington, D.C., September, 1995. |
 | | "Edward P. Henderson and the Development of Meteoritics at the Smithsonian Institution, 1929-1965," Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, D.C., May, 1995. |
| publish.uwo.ca /~hplotkin (983 words) |
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