TY  - BOOK
AU  - CLARK , JOHN A
TI  - PHYSCIS OF TODAY
U1  - Pg172 
CY  - LONDON
PB  - CONSTABLE AND COMPANY
KW  - PHYSICS
N1  - Pg mean Physics General & Mechanics Page 457-464 in A to Z Accession Register (Acc. No. Pg1-Pg228) & Page 640 (Acc. No. 224-231)
ER  -