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Jodha, N S (1980) Intercropping in traditional farming systems. The Journal of Development Studies, 16 (4). pp. 427-442. ISSN 0022-0388
Matlon, P J (1980) Local varieties, planting strategies and early season farming activities in two villages of Central Upper Volta. Monograph. Economics Program, ICRISAT/West Africa.
Mead, R and Willey, R W (1980) The concept of a 'land equivalent ratio' and advantages in yields from intercropping. Experimental Agriculture, 16 (3). pp. 217-228. ISSN 0014-4797