TY  - BOOK
AU  - Lofts,Brian
TI  - Animal photoperiodism
T2  - Institute of biology. Studies in biology; 25
AV  - PAM QP82.2.L5L6 
PY  - 1970///
CY  - London : 
PB  - E. Arnold (Publishers), Ltd
KW  - Photoperiodism
ER  -