TY  - BOOK
AU  - Mayr, Ernst.
AU  - Linsley, E. Gorton.
AU  - Usinger, Robert L.
TI  - Methods and Principles of Systematic Zoology / 
U1  - 590.028 
PY  - 1953///
CY  - .- New York
PB  - : McGraw-Hill
KW  - Pure Sciences
KW  - Animals
KW  - Zoology
ER  -