TY  - BOOK
AU  - Gregory,J.W.
AU  - Barrett,Benjamin Hilton
TI  - General stratigraphy
U1  - 551.7 22
PY  - 1931///
CY  - London
PB  - Methuen & Co. ltd.
KW  - Geology, Stratigraphic
KW  - Paleontology
ER  -