Baird, David McCurdy,   1920- <br/><br/>
Our earth in continuous change / 
David M. Baird 
 - Toronto :  McGraw-Hill,  1971 
 - 118 p. :   ill. , (part col.) ;  30 cm. 
<br/><br/><label>ISBN: </label>0770003168 
<br/><br/><label>LCCN: </label>78-155551 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology