TY  - BOOK
AU  - Lal,K.C., Ahmad,S.I.
AU  - x
TI  - A textbook of  modern physics: x
SN  - x
U1  - 539/L193t 
PY  - 1993///
CY  - New Delhi
PB  - S.Chand
KW  - Physics
N1  - x
ER  -