TY  - BOOK
AU  - Richards John F
TI  - The Unending frontier:  A environmental history of early Modern World   
T2  - California World History Library
SN  - 0520230752
U1  - U475:(G:5).1.k, P3 
PY  - 2003///
CY  - Berkeley
PB  - University of California Press       
KW  - Social Geography
N1  - Bibliography p623-660
ER  -