TY  - BOOK
AU  - Thomson,Arthur Landsborough
TI  - Problems of bird-migration,
AV  - QL698 .T48
PY  - 1926///
CY  - [London]
PB  - H.F. & G. Witherby
KW  - Birds
KW  - Migration
N1  - "References" at end of each chapter
ER  -