TY  - BOOK
AU  - Dufour, Frank O.
TI  - Structural drafting: a practical presentation of drafting and detailing methods used in drawing up specifications for structural steel work 
SN  - 978-1376-32020-6 (pbk.)
PY  - 1913///
CY  - Chicago: 
PB  - American School of Correspondence, 
KW  - Structural drawing
N1  - Includes index
ER  -