(2012). U. P. S. C (I. E. S) engineering services examination: Mechanical engineering solved papers. Koncept Books.
Chicago Edition CitationU. P. S. C (I. E. S) Engineering Services Examination: Mechanical Engineering Solved Papers. Dehradun: Koncept Books, 2012.
Deismireacht MLAU. P. S. C (I. E. S) Engineering Services Examination: Mechanical Engineering Solved Papers. Koncept Books, 2012.
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