TY  - BOOK
AU  - Howe,Henry Marion
TI  - The metallography of steel and cast iron / 
PY  - 1916///
CY  - New York : 
PB  - McGraw-Hill book company, inc.
KW  - ACERO
KW  - METALURGIA
KW  - HIERRO
UR  - https://archive.org/details/metallographyst02howegoog/page/n9/mode/2up
ER  -