Problem of land snail pests in agriculture ( A study of the giant african snail ) - P.D. Srivastava (New Delhi Concept Publishing Company, 1992)
P.D. Srivastava: Problem of land snail pests in agriculture ( A study of the giant african snail ). New Delhi. Concept Publishing Company, 1992. 81-7022-435-7--(632.643SRI)
ENGLISH