Pettofrezzo, Anthony J. <br/><br/>
Arithmetic, a programmed approach /  [textbook] 
by Anthony J. Pettofrezzo and  Lee H. Armstrong. 
 - Dalas :  Scott, Foresman,  1982. 
 - 854 pages :  illustrations ;  28 cm. 
<br/><br/>Includes bibliographic references and index. 
<br/><br/><label>ISBN: </label>0673153142  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic.<br/>Arithmetic--Programmed instruction.
<br/><br/><label>LC Class. No.: </label>QA107  / PET