TY  - BOOK
AU  - Tracy;George; R.Tropp;Harry E. and  Friedl Alfred E.,
TI  - Modern physical science
SN  - 0-03-007381-2
U1  - 500.2 T67M 
PY  - 1974///
PB  - Newyork;Holt.Rinehart and winston 
KW  - Physics
ER  -