TY  - BOOK
AU  - Allee W C
AU  -  Emerson A E
AU  -  Park O
TI  - Principles of animal ecology
U1  - K:5, H9 
PY  - 1949///
CY  - Philadelphia
PB  - W B Saunders       
KW  -  Animal ecology
KW  - Zoology
ER  -