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Household typology for relating social diversity and technical change : the example of rural households in the Khanbashe area of the Eastern Cape Province of South Africa. Laurent Catherine, Van Rooyen Johan, Madikizela P., Bonnal Philippe, Carstens Johan. 1998. In : International Association of Agricultural Economists Symposium. s.l. : s.n., 16 p. International Association of Agricultural Economists Symposium, Afrique du Sud, Août 1998.

Systems approaches for agriculture and rural development in the South African transition situation. Laurent Catherine, Van Rooyen Johan, Bonnal Philippe, Carstens Johan, Hubert Bernard. 1998. In : AFSRE International Symposium. 15. s.l. : s.n., 6 p. AFSRE International Symposium. 15, Pretoria, Afrique du Sud, 29 Novembre 1998/4 Décembre 1998.