Davis, Thomas A. <br/><br/>
Real numbers and elementary algebra / 
Thomas A. Davis. 
 - New York :  Harcourt Brace Jovanovich,  1972. 
 - ix, 254 p. :  ill. 
 - Algebra and trignometry in four programmed volumes .
<br/><br/><label>ISBN: </label>0155021516 
<br/><br/><label>LCCN: </label>88900786  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra.<br/>Trignometry--Programmed instruction.