00425nam a2200157Ia 4500008004100000020001500041082001600056100001800072245005500090260004300145300000800188650001400196650002000210653001600230653002100246170901s1976    xx            000 0 und d  a0198594593  a338.1bU-5A  aUpton, Martin 0aAgricultural Production Economics and Resource-Use  aGlasgowbOxford University Pressc1976  a357  aEconomics  aSocial sciences  aAgriculture  aEconomic aspects