TY  - BOOK
AU  - Macomber, Freeman Glenn
TI  - Principles of teaching in the elementary school
U1  - BIB-TELLO/06.03.06/1542 
PY  - 1954///
CY  - New York
PB  - American Book Company, 
KW  - EDUCACIÓN PRIMARIA
KW  - ENSEÑANZA
KW  - ESTADOS UNIDOS
ER  -