Singh, D.N. Singh, J. <br/><br/>
Introduction to our earth and environment 

 - Varanasi  Environment and Development study centre  1988 
 - xvi,235p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Earth
<br/><br/><label>Dewey Class. No.: </label>551.1  / S48I