Oswald, Krar. <br/><br/>
Drafting math modules / 
Krar Oswald. 
 - SI ed. 
 - Don Mill, Ontario :  General Publishing,  1976. 
 - 1.v (various pages) :  ill. ;  26 cm. 
<br/><br/> A genetic skills approach 
<br/><br/><label>ISBN: </label>0773650164 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical models.<br/>Mathematics.
<br/><br/><label>Dewey Class. No.: </label>511.8