Assembly of Mathematical and Physical Sciences (U.S.). Astronomy Survey Committee Astronomy and astrophysics for the 1980's / Astronomy Survey Committee, Assembly of Mathematical and Physical Sciences, National Research Council.

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Assembly of Mathematical and Physical Sciences (U.S.). Astronomy Survey Committee

Astronomy and astrophysics for the 1980's / Astronomy Survey Committee, Assembly of Mathematical and Physical Sciences, National Research Council.

Astronomy

Astrophysics