AU  - Swingle ,Deane B.
AU  - Sinnott,Edmund W.
TI  - Text book of systematic botany / 
T2  - McGraw-hill publications in the botanical sciences
U1  - 581 
PY  - 1933///
CY  - London : 
PB  - McGraw-Hill , 
KW  - Botany
ER  -