TY  - BOOK
T1  - Ciencias naturales 7
A1  - Hess, Eduardo
LA  - Spanish
PP  - Santiago
PB  - Santillana
YR  - 1988
ED  - 4° ed,
UL  - https://glotrec.wdi-testing.gei.de/cat/Record/manes88180
OP  - 112
ER  -