Tripathi , Bramhma Dutta Swarth se parmarth tak : Paryawaran Vegyanik ka atmchintan / Bramhma Dutta Tripathi - 1st ed. - New Delhi : National Book Trust, India, New Delhi . - xi, 114 p. ; 20 cm. ISBN: 9788123778136 Subjects--Topical Terms: 1. Environmental Science Dewey Class. No.: 628 / TRI/B