TY  - BOOK
AU  - Davies P H
AU  -  Heywood V H
TI  - Principles of angiosperms taxanomy
U1  - I5:11, K3;6 
PY  - 1963///
CY  - Edinburgh
PB  - Oliver & Boyd       
KW  -  Flowering plant
KW  - Botany
ER  -