Pathological witting of plants : proceedings of a symposium held at the centre for Advanced study in botany, University of Madras, January 18-24, 1971 - Sadasivan, T.S., ed.; Devi, L. Saraswathi, ed.; Kalyanasundaram, R., ed.; Subramanian, C.V., ed. (University of Madras Madras, 1978)