TY  - BOOK
AU  - WIDGREN, Mats
TI  - Besieged palaeonegritics or innovative farmers : historical political ecology of intensive and terraced agriculture in West Africa and Sudan 
SN  - 00020184
PY  - 2010///
CY  - Abingdon
PB  - University of Witwatersrand (Taylor & Francis) 
ER  -