Hajra Choudhury, S. K. Elements of workshop technology : Vol. 1 Manufacturing process / S. K. Hajra Choudhury, A. K. Hajra Choudhury and Nirjhar Roy. - 15th ed. - Mumbai : Media Promoters & Publisher, 2014. - xiv, 670 p.; ill. ; 22 cm. ISBN: 8185099146 Subjects--Topical Terms: Machine-shop practice. Manufacturing processes. Mechanical engineering. Dewey Class. No.: 621.75 / HAJ