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Penn, Raymond J.; Jordahl, Harold C. - In: Journal of farm economics 49 (1967) 5, pp. 1277-1294

Persistent link: https://www.econbiz.de/10003592478

Penn, Raymond J. - 1966

Persistent link: https://www.econbiz.de/10002621395

Penn, Raymond J. - In: Land problems and policies, (pp. 219-233). 1950

Persistent link: https://www.econbiz.de/10002621411

Penn, Raymond J. - In: Land economics : applied research on environmental resources 37 (1961) 2, pp. 99-104

Persistent link: https://www.econbiz.de/10002621423

Penn, Raymond J. - In: Food goals, future structural changes, and agricultural …, (pp. 217-229). 1969

Persistent link: https://www.econbiz.de/10002621512

Penn, Raymond J. - In: American journal of agricultural economics 51 (1969) 5, pp. 999-1002

Persistent link: https://www.econbiz.de/10002621540

Penn, Raymond J. - In: Journal of farm economics 41 (1959) 2, pp. 185-188

Persistent link: https://www.econbiz.de/10002622651

Shafie, Mahmoud A. El-; Penn, Raymond J. - In: Resources and development : natural resource policies …, (pp. 149-169). 1980

Persistent link: https://www.econbiz.de/10003649501

Dorner, Peter; Penn, Raymond J. - In: Resources and development : natural resource policies …, (pp. 275-304). 1980

Persistent link: https://www.econbiz.de/10003532678

Poulin, François; Penn, Raymond J.; Smith, Stephen C.; … - In: Journal of farm economics 49 (1967) 5, pp. 1271-1294

Persistent link: https://www.econbiz.de/10002820952