TY  - BOOK
ED  - National Geographic Society U.S.
TI  - Los porqués de nuestro mundo
T2  - Colección Explora y aprende
SN  - 0915741482
PY  - 1993///
CY  - Washington, D.C., Charlotte, N.C.
PB  - National Geographic Society, Stampley Enterprises
KW  - Science
KW  - Miscellanea
KW  - Juvenile literature
KW  - Local
KW  - Preguntas y respuestas para niños
KW  - Literatura juvenil
KW  - Ciencia
KW  - Miscelánea
KW  - LEMB
KW  - Children's questions and answers
N1  - Translation of: Why on earth?; Includes index
N2  - Questions and answers present information on science topics, including human physiology, animal behavior, earth science, and natural science
ER  -