TY  - BOOK
ED  - Editorial Sigmar 
TI  - Como funcionan las maquinas
T2  - Coleccion 101 preguntas
SN  - 9501113787
PY  - 2001///
CY  - Buenos Aires
PB  - Editorial Sigmar
KW  - Machinery
KW  - Juvenile literature
KW  - Children's questions and answers
N1  - "Es una edicion Sigmar"--P. [4] of cover; Includes index
N2  - A simple introduction to machines of all kinds--at home, at work, in industry, in the entertainment field, computers and more--in a question-and-answer format
ER  -