TY  - BOOK
AU  - Crosby , Alfred W.  .
TI  - Ecological imperalism : the biological expansion of Europe 900-1900 / 
SN  - 0-521-45690-8
U1  - V5 
PY  - 1992///
CY  - Cambridge : 
PB  - Cambridge University Press , 
KW  - History
ER  -