TY  - BOOK
TI  - Evolution; essays on aspects of evolutionary biology
T2  - Mc Graw-Hill Publications in the Zoological Sciences
U1  - 576.1  G6 
PY  - 1936///
CY  - New York
PB  - Mc Graw-Hill
KW  - Shull, A.Franklin.
KW  - Evolution
ER  -