Teaching school mathematics / 
edited by W. Servais and T. Varga. 
 - Harmondsworth :  Penguin,  1971. 
 - 308 p. :  ill. (some col.) 
 - A Unesco source book Penguin education .
<br/><br/><label>ISBN: </label>0140800840 
<br/><br/><label>Nat. Bib. No.: </label>B71-23919 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Secondary)
<br/><br/><label>LC Class. No.: </label>QA11  / .S46 
<br/><br/><label>Dewey Class. No.: </label>510/.71/2