@misc{Halpern_Jan_The_1968,
 author={Halpern, Jan},
 volume={18},
 editor={Kalinowska, Fryderyka. Tr.},
 editor={Institute of History of the Polish Academy of Sciences},
 copyright={Rights Reserved - Restricted Access},
 address={Wrocław},
 journal={Acta Poloniae Historica},
 howpublished={online},
 year={1968},
 publisher={Zakład Narodowy im. Ossolińskich},
 language={eng},
 type={Text},
 title={The Roots of Agricultural Changes in Precapitalist West Africa},
 keywords={agriculture, agricultural production, West Africa 19th-20th c., economy},
}