TY  - BOOK
AU  - Davis , Harmer E  .
AU  - Troxell,George Earl  .
AU  - Wiskocil,Clement T  .
TI  - Testing and inspection of engineering materials / 
U1  - 621.3 
PY  - 1950///
CY  - New York : 
PB  - McGraw Hill Book Company , 
ER  -