Brown, Stephen I. <br/><br/>
The art of problem posing / 
Stephen I. Brown, Marion I. Walter. 
 - 3rd ed. 
 - New York :  Routledge,  2012. 
 - ix, 182 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and indexes. 
<br/><br/><label>ISBN: </label>0805849777 (pbk.) 9780805849769 (hbk.) 0805849769 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Problem solving.