Buckingham, Earle. <br/><br/>
Manual of gear design, section three :  standards, formulas, and tables for designing  helical gears for parallel-shaft drives and spiral gears for non-parallel, non-intersecting shafts / 
by Earle Buckingham. 
 - New York :  Industrial Press,  c1962. 
 - 172 p. 
<br/><br/> Cover title: Helical and spiral gears. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gearing--Design.<br/>Gearing, Spiral