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Lee, K K and Wani, S P (1989) Significance of Biological Nitrogen Fixation and Organic Manures in Soil Fertility Management. Special Publication - International Fertilizer Development Center (SP-11). pp. 89-108.
Pawar, C S and Bhatnagar, V S and Jadhav, D R (1989) Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) as a parasite of Helicoverpa armigera (Hub.) (Lepidoptera: Noctuidae) in southwest India. Proceeding of the Indian Academy of Sciences, 98 (4). pp. 259-265. ISSN 0253-4142
Reed, W and Lateef, S S and Sithanantham, S (1989) Compatibility of Host-Plant Resistance and Biological Control of Heliothis spp. (Lep.: Noctuidae). In: Proceedings of the Workshop on Biological Control of Heliothis: Increasing the Effectiveness of Natural Enemies, 11-15 November 1985, New Delhi, lndia.
Sahrawat, K L and Pardhasaradhi, G and Murthy, K V S (1989) Evaluation of distilling the entire digest or an aliquot for total nitrogen determination in soil digests. Fertilizer Research, 19 (1). pp. 39-43. ISSN 0167-1731