1.

図書
図書
1. Report on active and planned spacecraft and experiments
edited by Robert W. Vostreys, Harriet H. Malitson
出版情報: Greenbelt, Md. : National Space Science Data Center (NSSDC) / World Data Center a for Rockets and Satellites (WDC-A-R&S), National Aeronautics and Space Administration, Goddard Space Flight Cente, 1981
シリーズ名: NSSDC/WDC-A-R&S ; 81-10
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2.

図書
図書
2. Modern observational techniques for comets : proceedings of a workshop held at Goddard Space Flight Center, Greenbelt, Maryland, on October 22-24, 1980
United States. National Aeronautics and Space Administration ; Jet Propulsion Laboratory (U.S.)
出版情報: Washington, D.C. : National Aeronautics and Space Administration, : for sale by the Supt. of Docs., U.S. G.P.O., 1981
シリーズ名: JPL publication ; 81-68
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