Watkins J S <br/><br/>
Our geological environment 

 - Philadelphia  W B Saunders         1975 
 - xi,519p.  cm. 
 - Saunders Golden Series in Environmental Studies .
<br/><br/> Bibliography 501-508p 
<br/><br/><label>Standard No.: </label>45803 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Environmental protection<br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H:(G:55), L5