Soifer, Alexander. <br/><br/>
Mathematics as problem solving / 
Alexander Soifer. 
 - Colorado Springs :  Center for Excellence in Mathematical Education,  1987. 
 - 117 p. :  ill. ;  22 cm. 
<br/><br/>Bibliography: p. 117. 
<br/><br/><label>ISBN: </label>0940263009 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Problem solving.