Trachtenberg speed system of basic mathematics 
Cutler, Ann. 
 - Westport, Conn. :  Pan books Ltd.,   1962 
 - 270 p. ;  23 cm. 
<br/><br/> Reprint. Originally published: Garden City, N.Y. : Doubleday, 1960. 
<br/><br/><label>ISBN: </label>0313232008 (lib. bdg.)