edited by Debiprasad Chattopadhyaya ; in collaboration with Mrinal Kanti GangopadhyayaIndian Council of Philosophical Research in association with Ṛddhi-India1990
jointly sponsored by Asiatic Society, Calcutta, and Indo-GDR Friendship Society, West Bengal, in celebration of the 80th birthday of Professor Walter Ruben ; edited by Debiprasad ChattopadhyayaK.P. Bagchi1981