TY  - BOOK
AU  - Croft,Terrell
AU  - Tangerman,E.J.
TI  - Steam-engine principles and practice / 
PY  - 1939///
CY  - New York and London
PB  - McGraw-Hill book company, inc.
KW  - MAQUINAS DE VAPOR
UR  - https://archive.org/details/steamengineprinc00crofrich/page/262/mode/2up
ER  -