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Flohr, M and Williams, J H and Lenz, F (1990) The Effect of Photoperiod on the Reproductive Development of a Photoperiod Sensitive Groundnut (Arachis hypogaea L.) Cv. NC Ac 17090. Experimental Agriculture, 26 (4). pp. 397-406. ISSN 1469-4441
Witzenberger, A and Williams, J H and Lenz, F (1985) Yield, components of yield and quality responses of groundnut cultivars (Arachis hypogaea L.) as influenced by photoperiod and a growth regulator. Field Crops Research, 12. pp. 347-361. ISSN 0378-4290
Matthews, R B and Azam-Ali, S N and Saffell, R A and Peacock, J M and Williams, J H (1991) Plant growth and development in relation to the microclimate of a sorghum/groundnut intercrop. Agricultural and Forest Meteorology, 53 (4). pp. 285-301. ISSN 0168-1923