Accompanied by: Introduction to the map of the ruins of Dzibilchaltun, Yucatan, Mexico / Edward B. Kurjack. v, 17 p. : ill., maps ; 27 cm. Date 1979 Type Maps Physical description 34 maps ; 51 x 100 ...

An analysis of a stalagmite within a Mexican cave reveals detailed evidence of drought that contributed to the downfall of ...