TY  - BOOK
AU  - Spring, Harry Mortimer
TI  - Boiler operator's guide: Construction, operation, inspection, and maintenance of steam boilers, with 310 typical steam engineers's examination questions and answers
AV  - TJ289 S6
PY  - 1940///
CY  - New York
PB  - McGraw-Hill
KW  - Calderas de vapor
ER  -