Spencer, Henry Cecil,  1903- <br/><br/>
Basic technical drawing / 
Henry Cecil Spencer, John Thomas Dygdon. 
 - [4th ed.] 
 - New York :  Macmillan,  1974. 
 - 484 p. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mechanical drawing.