Moon, Barbara  <br/><br/>
The Canadian shield / 
Barbara Moon. 
 - Toronto :  N.S.L. Natural Science of Canada Limited,  c 1970. 
 - 160 p. :  ill. 
<br/><br/><label>ISBN: </label>0919644082 
<br/><br/><label>Dewey Class. No.: </label>917.1