TY  - BOOK
AU  - Simpson GG
TI  - Principles of classification and a classification of Mammals
U1  - 560.8 
PY  - 1945///
CY  - New York
PB  - American Museum of Natural History
KW  - Mammals
KW  - Paleontology
N1  - Published in Bulletin of the American Museum of Natural History
ER  -