TY  - BOOK
ED  - American Philosophical Society
TI  - Transactions of the American Philosophical Society: new series
U1  - 560.172 
PY  - 1962///
CY  - Philadelphia
PB  - American Philosophical Society
KW  - Paleontology
KW  - Paleozoic paleontology
N1  - v.52,pt 2-Olson, EC : late permain terrestrial vertebrates, USA and USSR, 1962
ER  -