TY  - BOOK
AU  - Twenhofel, William H.
AU  - Shrock, Robert R.
TI  - Principles of invertebrate paleontology
T2  - International series in earth sciences
AV  - QE770 T83
PY  - 1953///
CY  - New York
PB  - McGraw-Hill
KW  - Invertebrados fósiles
ER  -