Proccedings 

 - Paris  UNESCO         1968 
 - 575p. Bib at the end of each chapter  cm. 
 - Natural resources series .
<br/><br/><label>Standard No.: </label>123182 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography
<br/><br/><label>Dewey Class. No.: </label>"U18:M95(D:28)p1,N64, K8"