R. M Dubey Human Ecology and Environmental Education ( Interdisciplinary approaches ) Vol 1. - Allahabad Chugh Publications 1992 - 368p - Vol1 . R. M Dubey: Human Ecology and Environmental Education ( Interdisciplinary approaches ) Vol 1.. Allahabad. Chugh Publications, 1992. 81-85613-31-1(V1)--(302DUB) ENGLISH ISBN: 81-85613-31-1(V1) Dewey Class. No.: 302 / DUB