Efron, Alexander <br/><br/>
The teaching of physical sciences in the secondary schools of the United States, France, and Soviet Russia. 

 - New York :  Columbia University Press,  1937. 
 - 296 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ESTADOS UNIDOS<br/>FILOSOFIA<br/>FISICA<br/>FRANCIA<br/>INVESTIGACION EDUCATIVA<br/>METODOS PEDAGOGICOS<br/>URSS
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>FILOSOFIA