Nelson, Carl Erwin,  1903-. <br/><br/>
Modern drafting techniques for quality microreproductions / 
Carl E. Nelson. 
 - Silver Spring, Md. :  National Microform Association,  1971. 
 - ix, 38 p. :  ill. ;  28 cm. 
 - NMA informational monograph ;  no. 3 .
<br/><br/>Includes bibliographical references (p. 31-35) and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drawing--Room practice.<br/>Microphotography.