TY  - BOOK
AU  - Phondke,Bal
AU  - Roy, Subhash 
TI  - When ... questions to 50 interesting answers
T2  - Popular science
SN  - 9788123755465
U1  - 500 
PY  - 2009///
CY  - New Delhi
PB  - National Book Trust
KW  - Science
KW  - Miscellanea
KW  - Mathematics
N1  - Title appears on background as "?"; Includes bibliographical references
ER  -