Dick, S. J. (2003). Sky and ocean joined: The U.S. Naval Observatory, 1830-2000. New York: Cambridge University Press.
Trích dẫn kiểu ChicagoDick, Steven J. Sky and Ocean Joined: The U.S. Naval Observatory, 1830-2000. New York: Cambridge University Press, 2003.
Deismireacht MLADick, Steven J. Sky and Ocean Joined: The U.S. Naval Observatory, 1830-2000. New York: Cambridge University Press, 2003.
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