TY  - BOOK
AU  - Heywood, V.H.
TI  - Botanical Systematics: An Occasional Series of Monographs
U1  - 580 
PY  - 1976///
CY  - London
PB  - Academic Press
KW  - Botanical sciences
KW  - Pure Sciences
KW  - Botany
KW  - Classification
ER  -