Design of machine elements : incorporates both U.S. customary and SI units 
M.F. Spotts. 
 - 6th edition. 
 -  Prentice Hall.  1991 
 - xviii, 730 pages. 
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<br/><br/><label>ISBN: </label>9-81002915-2 
<br/><br/><label>Dewey Class. No.: </label>M 621.815 Sp6d 1991