Vyas, Manohar Vyas पर्यावरण विश्वकोष: Encyclopedia of environment Paryavaran Vishwakosh: Encyclopedia of environment - 1st ed. - Jaipur: University Book House (Pvt.) Ltd., 1994 - 33p. ISBN: 81-85488-33-9 Subjects--Topical Terms: Environmental science Universal Decimal Class. No.: 504(031) / N4