sponsored by NASA Office of Space Science and held at the Goddard Space Flight Center, Greenbelt, Maryland, October 1977 ; editors, M. Neugebauer ... [et al.]

National Aeronautics and Space Administration, Scientific and Technical Information Branch 1979 NASA conference publication 2089

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sponsored by NASA Office of Space Science and held at the University of Chicago, January 19-21, 1978 ; editors, David Morrison, William C. Wells ; co-chairmen, Edward Anders, David Morrison

NASA, Scientific and Technical Information Office , for sale by the National Technical Information Service] 1978 NASA conference publication 2053

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