TY  - BOOK
AU  - Hillman,William S.
TI  - Photoperiodism in plants and animals
T2  - Carolina biology readers
PY  - 1979///
CY  - Burlington, N. C.
PB  - Scientific Publications Division, Carolina Biological Supply Co.
KW  - Photoperiodism
KW  - Local
KW  - Plant photoperiodism
KW  - Light
KW  - Physiological effect
N1  - Cover title; Bibliography: p. 16
ER  -