Efron, Alexander
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.
ESTADOS UNIDOS
FILOSOFIA
FISICA
FRANCIA
INVESTIGACION EDUCATIVA
METODOS PEDAGOGICOS
URSS
FILOSOFIA
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.
ESTADOS UNIDOS
FILOSOFIA
FISICA
FRANCIA
INVESTIGACION EDUCATIVA
METODOS PEDAGOGICOS
URSS
FILOSOFIA