TY  - BOOK
AU  - Shelter,Stanwyn G.
AU  - Skog,L E.
TI  - A provisional checklist of species for flora North America (revised)
T2  - Monographs in systematic botany
U1  - 581.97 
PY  - 1978///
CY  - St Louis, Missouri
PB  - Missouri Botanical Garden
KW  - Botany
KW  - United States
KW  - Identification
KW  - North America
ER  -