TY  - BOOK
AU  - Elonka Stephen
TI  - Standard Boilers Operators' Questions And Answers 
SN  - 0-07-099292-4
AV  - TJ 289.E4 
PY  - 1973///
CY  - New Delhi
PB  - Tata Mcgraw-Hil Publ
ER  -