TY  - BOOK
AU  - National Geographic Society
TI  - Mysteries of the ancient world: / National Geographic Society
U1  - 930 M998 1979 
PY  - 1979///
CY  - Washingtom, D.C.
PB  - National Geographic Society
KW  - Civilization, Ancient
KW  - Earthworks (Archaeology)
ER  -