Greek and Roman sundials

von Gibbs, Sharon L.
Yale studies in the history of science and medicine ; 11
New Haven, [Conn.] : Yale University Press, 1976.
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The Caracol Tower at Chichen Itza: an ancient astronomical observatory? - Washington, D.C.

von Aveni, Anthony F.
Veröffentlicht in Science; 188.1975, no.4192, S. 977-985: zahlr. Ill.; 1 Tab.
1975.