TY  - BOOK
AU  - Grabau A W
TI  - Principles of stratigraphy
U1  - 551.701 
PY  - 1960///
CY  - New York
PB  - Dover pub
KW  - Stratigraphy
N1  - v1 -xxxiv,581p. v2- 582-1185p
ER  -