Wickramasinghe S A <br/><br/>
The way ahead  an eco po;licy for cycle 

 -  1955 
 - 84p  cm. 
<br/><br/><label>Standard No.: </label>146690 
<br/><br/><label>Source: </label> Thesis and Dissertations 
<br/><br/><label>Dewey Class. No.: </label>"X.4498.N5, J5"