Elonka, Stephen M., Standard Boiler Operators : Questions and Answers / by Stephen M. Elonka & Anthony L. Kohan . - 29th Reprint. - New Delhi Tata Mc Graw Hill 2009 - 365p.: 16cm. ISBN: 9780070992924 Subjects--Topical Terms: Mechanical Engineering Dewey Class. No.: 621.183