Purohit, S. S. <br/><br/>
A text book of environmental sciences:  as per unified ugc syllabus / 
S. S.Purohit, Q. J. Shammi, A. K. Agrawal. 
 - Jodhpur (India) :  Student edition,  c2004. 
 - 397 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8188826146 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences.