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Thorne, Whynne (contributor) - 1963

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Dunin-Barkovskiy, L. V. - In: Soviet geography : review and translation 9 (1968) 6, pp. 458-468

Persistent link: https://www.econbiz.de/10002102340

Duvick, Richard D. - In: Agricultural sector planning : a general system …, (pp. 253-265). 1978

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Edwards, K. A. - In: The development of Kenya's semi-arid lands, (pp. 84-101). 1981

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Adam, Farah Hassan; Salih, Aziz; Zaki, El Sayed Ali Ahmed - In: Agricultural economics bulletin for Africa (1971), pp. 53-72

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Adegboye, R. O.; Oni, S. A. - 1975

Persistent link: https://www.econbiz.de/10001815619

El-Nakhal, Hamed Ahmed - In: Maǧallat dirāsāt al-Ḫalīǧ wa-'l-Ǧazīra … 5 (1979), pp. 71-87

Persistent link: https://www.econbiz.de/10001819055

Crawford, Ivan C. - 1957

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Joy, Charles Rhind - 1967

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Joyner, Conrad - In: The southwestern social science quarterly 39 (1958) 3, pp. 215-223

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