.: Gembloux, J. Duculot, 1933, lg in-8°, frontispiece portrait of the future Leopold III, 538 pp, many ills., stiff paper wrapper, unopened pages. Front wrapper slightly soiled due to the removal of a library label, partly unopened copy.. Texts in Dutch and French. Scientific proceedings. Organised by the Universities of Gent and Leuven and the Institut agronomique de l'Etat à Gembloux. On soils, plants, crops etc in the former Belgian Congo.