TY  - BOOK
AU  - BERTHOLD,PETER
TI  - BIRD MIGVATION-AGENERAL SURVEY / 
U1  - 398.252 
PY  - 1993///
CY  - [S.N] : 
PB  - OXFORD UNIVERSITY PRESS ، 
KW  - BIRDS
KW  - EMIGRATION
ER  -