Bhatt, N.D <br/><br/>
Elementary Engineering Drawing 

 - 39 
 - India  Charotar Publishing House  1998 
 - p.635 
<br/><br/><label>Subjects--Topical Terms: </label> Lines,Lettering and Dimensioning  Geometrical Construction  Orthographic Projection  Helices and Screw Threads 
<br/><br/><label>Dewey Class. No.: </label>744.422 B575E