TY  - BOOK
AU  - Vankat John L
TI  - Natural vegetation of North America:  An introducti   
SN  - 0471017701
U1  - U35.71.N7, L9 
PY  - 1979///
CY  - New York
PB  - John Wiley        
KW  - Biogeography
N1  - Bibliography Chapterwise; Appendix: P 251-55
ER  -