TY  - BOOK
AU  - Rugh,Roberts
TI  - The Frog: its reproduction and developmemnt 
PY  - 1951///
CY  - New York
PB  - McGraw-Hill Book
KW  - Frogs
KW  - Embryology
KW  - Amphibians
N1  - Bibliography: p. 311-320
ER  -