Mckay, Herbert <br/><br/>
Half-hours with geology / 
by Herbert Mckay ; illustrated by Alexander Murphy 
 - London :  Oxford University Press,  1960 
 - 140 p. ;  19 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civil engineering--History
<br/><br/><label>Dewey Class. No.: </label>550