1.

図書
図書
1. 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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2.

雑誌
雑誌
2. The telecommunications and data acquisition progress report
Jet Propulsion Laboratory, California Institute of Technology
出版情報: Pasadena, Calif. : Jet Propulsion Laboratory, California Institute of Technology
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