TY  - BOOK
AU  - Davis, P.H.
AU  - Cullen, J.
TI  - The identification of flowering plant families :  including a key to those native and cultivated  in North temperate regions
U1  - 582.1309123 
PY  - 1989///
CY  - Cambridge
PB  - Cambridge U.P.
N1  - PR
ER  -