TY  - GEN
T1  - The elaboration of school textbooks : methodological guide
A1  - Seguin, Roger
LA  - English
PP  - S.l.
YR  - 1989
UL  - http://glotrec.wdi-staging.gei.de/cat/Record/bnm156918
OP  - 63
KW  - Libros de texto
ER  -