TY  - BOOK
AU  - Mayr, Ernst
TI  - Principles of systematic zoology
T2  - xii,428p.: ill.; 22cm
U1  - 591.012 
PY  - 1971///
CY  - New Delhi
PB  - Tata McGraw-Hill
KW  - Zoology--Classification
KW  - Animals--Identification
ER  -