TY  - BOOK
AU  - Beck, Stanley D.
TI  - Insect Photoperiodism
U1  - 595.7 
PY  - 1968///
CY  - New York
PB  - Academic Press
KW  - Pure Sciences
KW  - Zoological sciences
KW  - Insects
KW  - Photoperiodism
ER  -