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Singh, S D and Williams, R J (1980) The role of sporangia in the epidemiology of pearl millet downy mildew. Phytopathology , 70 (12). pp. 1187-1190. ISSN 0031-949X
Thakur, R P and Rao, V P and Subba Rao, K V and Williams, R J (1980) Pearl Millet Improvement Program. Project Report. ICRISAT, Patancheru, Andhra Pradesh, India.
Thakur, R P and Williams, R J (1980) Pollination effects on pearl millet ergot. Phytopathology , 70 (2). pp. 80-84. ISSN 0031-949X
Willey, R W and Rao, M R (1980) A Competitive ratio for quantifying competition between intercrops. Experimental Agriculture, 16 (2). pp. 117-125. ISSN 0014-4797