1.

図書
図書
1. Atlas of sky overlay maps (for the Palomar sky survey)
by Robert S. Dixon, Mirjana R. Gearhart, Paul C. Schmidtke
出版情報: [Columbus] : Ohio state university radio observatory, c1981
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2.

図書
図書
2. A master list of nonstellar optical astronomical objects
compiled by Robert S. Dixon and George Sonneborn
出版情報: [Columbus] : Ohio State University Press, c1980
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