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4.
The study of comets: Parts 1 and 2. Proceedings of a conference held at Goddard Space Flight Center,Greenbelt, Md., October 28–November 1, 1974. Edited by B. Donn,M. Mumma,W. Jackson,M. A'Hearn,and R. Harrington. NASA SP-393, U.S. Government Printing Office,Washington, D.C. 1083 pp. $11.25
8.
Book Review: R.G. Strom,A.L. Sprague,Exploring Mercury. <Emphasis Type="Italic">The Iron Planet</Emphasis>, Springer–Verlag,Berlin Heidelberg,New York,printed in Berlin, 216 pages, 2003, softcover EUR 39.95(+VAT), SFR 68.50; GBP 24.50; US $39.95.
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