Megalithic science : Ancient mathematics and astronomy in North-West Europe.

von Heggie, Douglas C.
London : Thames and Hudson, 1981.
Umfang/Format: 156 S. : Abb. ; 8°.

Archaeoastronomy in the Old World

Cambridge ; New York : Cambridge University Press, 1982.
Umfang/Format: viii, 280 p. : ill. ; 24 cm.