India. Dept. of Science and Technology & Roy, A. K. (1982). Planning the environment: Based on a report submitted to Department of Science and Technology, New Delhi, in January 1981. s.n..

India. Dept. of Science and Technology and A. K. Roy. Planning the Environment: Based on a Report Submitted to Department of Science and Technology, New Delhi, in January 1981. [India: s.n., 1982.

India. Dept. of Science and Technology and A. K. Roy. Planning the Environment: Based on a Report Submitted to Department of Science and Technology, New Delhi, in January 1981. s.n., 1982.