TY  - BOOK
AU  - Shrock, Robert R.
TI  - Principles of Invertible Paleontology
U1  - 562 
PY  - 1953///
CY  - New York
PB  - McGraw-Hill Book Company
KW  - Paleontology/ Paleozoology
KW  - Pure Sciences
KW  - Paleontology
ER  -