TY  - BOOK
AU  - Williams, Robert Seaton
AU  - Homerberg, V. O.
TI  - Principles of Metallography 
U1  - 669.95 
PY  - 1939///
CY  - New York : 
PB  - McGraw-Hill, 
KW  - Metallography
N1  - NN
ER  -