TY  - BOOK
AU  - Lawrence, George Hill Mathewson.
TI  - Taxonomy of vascular plants
U1  - 580.12 
PY  - 1951///
CY  - New York
PB  - MacMillan
KW  - Botánica
KW  - Clasificación
N1  - 6th. Print. 1962; 8th. Print. 1963; 9th. Print. 1964
ER  -