Steffy, Wilbert <br/><br/>
Economic guidelines for justifying capital purchases / 
by Wilbert Steffy, Donald N. Smith, Donald Souter 
 - Ann Arbor :  Industrial Development Division, Institute of Science and Technology, University of Michigan,  1973 
 - viii, 141 p. ;  23 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machine tools--Numerical control