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Environmental energy resources

By Trivedi, P.R., ed.. New Delhi, Akashdeep publishing House, 1992 . v; 284p 8171582028

By Trivedi. P.R., ed.. New Delhi, Akashdeep Publishing House, 1992 . v, 184p 8171582230

By Trivedi. P.R., ed.. New Delhi, Akashdeep Publishing House, 1992 . iv; 350p 8171582753

By Trivedi, P.R., ed.. New Delhi, Anmol publishing House, 1992 . 278p 8171581633