TY  - BOOK
AU  - Mayr, Ernst
AU  - Ashlock, Peter D. 
TI  - Principles of systematic zoology
SN  - 0-07-112701-1
U1  - 591 
PY  - 1991///
CY  - New York
PB  - McGraw-Hill
KW  - Zoology
KW  - classification
ER  -