Singh, Y. K. <br/><br/>
Teaching of environmental science / 
Dr. Y.K. Singh 
 - New Delhi :  A P H Publishing,  2005 
 - 366 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>8176489093 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences--Study and teaching<br/>Human ecology--Study and teaching