00333nam a2200109Ia 4500008004100000020001900041040002900060050002300089100002400112245005000136260003700186230104s9999||||xx |||||||||||||| ||und||  a92-5-104-875-4  cChuka University Library  aHD 1411bR48 1977   aRitson, Christopher 0aAgricultural Economics: Principles and Policy  aGranada PublishingbLondonc1977