TY  - BOOK
AU  - Lawrence,George Hill Mathewson
TI  - An introduction to plant taxonomy
U1  - 580.12 23
PY  - 1955/// [Reprint 1968]
CY  - New York
PB  - Macmillan Co.
KW  - Plants
KW  - Classification
KW  - North America
N1  - Includes indexes
ER  -