TY  - BOOK
AU  - Bierhorst David W
TI  - Morphology of vascular plants
T2  - (The Macmillan biology series; Ed. Norman H.Giles and Johan G. Torrey)
U1  - I4:2, L1 
PY  - 1971///
CY  - New York
PB  - The macmillan company London    
KW  - BOTANY
ER  -