TY  - BOOK
AU  - Beck,Stanley D.
TI  - Animal photoperiodism: relationship of daylength to animal growth, development, and behavior 
PY  - 1963///
CY  - New York
PB  - Rinehart and Winston
KW  - Photoperiodism
KW  - Animal behavior
N1  - Bibliography : p. 117-118
ER  -