TY  - BOOK
AU  - Berthold,P.
TI  - Bird migration: a general survey 
T2  - Oxford ornithology series
SN  - 0198546920 :
AV  - QL698.9 B47313
U1  - 598.252/5 20
PY  - 1993///
CY  - Oxford, New York
PB  - Oxford University Press
KW  - Aves
KW  - Migración
N1  - "First published in German as Vogelzug--Eine kurze, aktuelle Gesamtübersicht"--Reverso de la portada; Includes bibliographical references (p. [207]-224) and index
ER  -