//-->
Arbeitsbedarf und Arbeitsaufwand in der Landwirtschaft der Bundesrepublik Deutschland seit 1949
Meier, Johannes, (1968)
Farm labor in Germany 1810 - 1945 : its historical development within the framework of agricultural and social policy
Wunderlich, Frieda, (1961)
Economic security for hired farm workers : implications of extending unemployment insurance to hired agricultural labor
(1972)
Agricultural development and employment performance and planning : a comparative analysis
Thorbecke, Erik, (1974)