TY  - BOOK
AU  - Beck,StanleyD., x
AU  - x
TI  - Animal photoperiodism: Relationship of daylength Animal growth, developmebnt, and behavior
SN  - x
U1  - 591.5/BEA 
PY  - 1963///
CY  - N.Y.
PB  - Holt
KW  - Phychology, Comparative
N1  - x
ER  -