TY  - BOOK
TI  - Planeta tierra
SN  - 9501113752 :
PY  - 2001///
CY  - Buenos Aires
PB  - Editorial Sigmar
KW  - Children's questions and answers
KW  - Juvenile literature
KW  - Tierra
KW  - Literauatura juvenil
KW  - bidex
KW  - Earth (Planet)
N1  - "Es una edicion Sigmar"--P. [4] of cover; Includes index
N2  - A general introduction to earth science in a question-and-answer format
ER  -