195,399 BHATIA BALRAJ / red./ Selected topics in environmental biology. Based on the Sessions on Environmental Biolo gy held at the XXVI international Congress of Physiological Sciences, New Delhi, October 20-26, 1974. Ed. by Balraj Bhatia, G. S. Chhina and Baldev Singh. Oxford 1977 Pergamon Press 4° a. XIV, nlb.2, 529, il.