Dufour, Frank O. <br/><br/>
Structural drafting :  a practical presentation of drafting and detailing methods used in drawing up specifications for structural steel work / 
Frank O. Dufour. 
 - Chicago:   American School of Correspondence,   c1913. 
 - 122 p. :  ill. ;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>978-1376-32020-6 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Structural drawing.