TY  - BOOK
AU  - Krug, Mark M.
TI  - History and the social sciences: new approaches to the teaching of social studies
U1  - 372.83 
PY  - 1967///
CY  - Massachusetts, Estados Unidos de América
PB  - Blaisdell Publishing Company, 
KW  - ESTUDIOS SOCIALES EN EDUCACIÓN PRIMARIA Y SECUNDARIA
ER  -