UNESCO <br/><br/>
New trends in chemistry teaching--vol-1  (1964--1965) # New trends in chemistry teaching--vol-2 # New trends in Chemistry teaching  Vol 2 

 - Unesco  United Nations  1968 # 1969 
 - x, 408  Pb  27cm 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>540.7