Literaturrecherche

Literatur Plate R, Böckenhoff E (1961) Methods of forecasting pig meat production in O.E.E.C. member countries. Paris: OECD, 61 p, Doc Food Agric 44

Literatur Olsen KH (1961) Agricultural regions in the O.E.E.C. countries : project no. 417. Paris: OEEC, 124 p, Doc Food Agric 41