Spencer, Henry Cecil. <br/><br/>
Technical drawing problems 
Henry Cecil Spencer. 
 - 9th ed. 
 - New York,  Macmillan Publishing Company, 
 - v, 88 p.: 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>MCE
<br/><br/><label>Dewey Class. No.: </label>604  / SPE