TY  - BOOK
AU  - Perelman,Yakov
TI  - Physics for entertainment
SN  - 9781401309213
U1  - 530 
PY  - 1975///
CY  - New York
PB  - Hyperion
KW  - GRAVITACION
KW  - MAGNETISMO
KW  - MECANICA
KW  - REFRACCION
ER  -