TY  - BOOK
AU  - Herak,Milan
AU  - Stringfield,Victor Timothy
TI  - Karst: important karst regions of the Northern Hemisphere 
SN  - 0444408495
PY  - 1972///
CY  - Amsterdam
PB  - Elsevier North-Holland
KW  - Karst
KW  - Europe
KW  - North America
N1  - Includes bibliographical references
ER  -