TY  - BOOK
AU  - Levens,A.S.
TI  - Graphics: with an introduction to conceptual design
U1  - 744.422 
PY  - 1962///
CY  - New York
PB  - John Wiley
KW  - Mechanical drawing
KW  - Engineering drawing
KW  - Structural drawing
KW  - Graphic methods
N1  - Includes index
ER  -