The Revised Orbit of Satellite 1958 Zeta.

Cambridge, Massachusetts: Smithsonian Institution Astrophysical Observatory, 1961. Paperback. 10.5" x 8". 17pp. Staple bound in printed wrappers. A fine copy. This technical paper is very uncommon. It Special Report number 64 in the "Research in Space Science" Series. Item #3506

Price: $12.00

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