Astronomical almanac for the year 2012 and its companion The astronomical almanac online : data for astronomy, space sciences, geodesy, surveying, navigation and other applications

United States Naval Observatory. Nautical Almanac Office 

Great Britain. Nautical Almanac Office 

United States. Dept. of the Navy 

United States. Congress 

Alternativt namn: Congress

Alternativt namn: Congress of the United States

Alternativt namn: United States Congress

Alternativt namn: Förenta staterna. Kongressen

Alternativt namn: Förenta staternas kongress

ISBN 978-0-7077-4121-5

Washington, DC : U.S. G.P.O., 2011

Engelska 1 v. (various pagings)

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