TY  - BOOK
AU  - EHRLICH,Robert
TI  - Turning The World Inside Out: : And 174 Other Simple physics Demonstrations 
SN  - 0-691-08534-x
U1  - 530. 
PY  - 1990///
CY  - New Jersey
PB  - Princeton University Press
KW  - 0
KW  - Grade 7-9
ER  -