TY  - BOOK
AU  - Tracy, George R.
AU  - Tropp, Harry E.
AU  - Friedl, Alfred E.
TI  - Modern physical science
SN  - 030726956
U1  - 500.2 
PY  - 1970///
CY  - New York
PB  - Holt, Rinehart and Winston
ER  -