(1952). The American ephemeris and nautical almanac for the year 1955. Washington: U.S. Government Printing Office.
Παραπομπή Chicago StyleThe American Ephemeris and Nautical Almanac for the Year 1955. Washington: U.S. Government Printing Office, 1952.
Παραπομπή MLAThe American Ephemeris and Nautical Almanac for the Year 1955. Washington: U.S. Government Printing Office, 1952.
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