Physical description for original version: 40 p. : 22 x 28 cm
原資料等に関する注記
原資料の出版事項: [Pasadena, Calif. ; Washington, D.C. : National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology : Supt. of Docs., U.S. G.P.O., distributor, 1991]