TY  - BOOK
AU  - Brecher,Erwin
AU  - Gerrard,Mike
TI  - Challenging science puzzles
SN  - 9788172451110 (pbk.)
U1  - 507.8 22
PY  - 0000///20-?
CY  - New Delhi
PB  - Goodwill Publishing House
KW  - Science
KW  - Experiments
KW  - Juvenile literature
KW  - Puzzles
KW  - Study and teaching
KW  - Activity programs
N1  - Includes bibliographical references and index
ER  -