Spencer, Henry Cecil <br/><br/>
Technical drawing problems /  
Henry Cecil Spencer, Ivan Leroy Hill , John Thomas Dygdon 
 - 3rd ed. 
 - New York :    Macmillan,    c1980 
 - iv, 81 p. :    ill. ;    28 cm 
 - Technical drawing problems series ;    3 .
<br/><br/><label>ISBN: </label>002414360X 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Mechanical drawing
<br/><br/><label>Dewey Class. No.: </label>Q 604.2 SPE