TY  - BOOK
AU  - HEYDECKER, W
TI  - Seed ecology: Proceedings of the nineteenth easter school in agricultural science, University of Nottingham, 1972
U1  - 581.48:581.5(06) 
PY  - 1973///
CY  - London
PB  - Butterworths
KW  - Seed ecology
ER  -