Trivedi, R.N. <br/><br/>
Textbook of environmental sciences 
R.N. Trivedi 
 - New Delhi  Anmol Publications  c1993 
 - ix, 410p.: ill.; 26cm 
<br/><br/><label>ISBN: </label>8170416825 
<br/><br/><label>Dewey Class. No.: </label>333.7  / TRI