TY  - BOOK
AU  - Crosby,Alfred W.
TI  - Ecological imperialism:  the biological expansion on Europe 900-1900
T2  - Studies in environment and history
AV  - GF50.C76 
PY  - 1986///
CY  - NewYork
PB  - Cambridge University Press
KW  - Animal migration-Europe-History
KW  - Plants-Europe-migration-history
KW  - Human ecology
KW  - Authropology-geography
ER  -