Inventories of Apparatus and Materials for Teaching Science /  Textual Documents 
UNESCO. 
 - 1st ed. / 
 - Paris :  UNESCO ,  1951. 
 - 111p. :  ill ;  22cm . 
 - Vol.III- 
<br/><br/><label>Subjects--Index Terms: </label>Mathematics Teaching Science G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>507  / Un 2 In