TY  - BOOK
AU  - Levens, Alexander
AU  - Chalk, William
TI  - Graphics in engineering design [3rd ed.]
SN  - 0471014788
U1  - 604.2 
PY  - 1980///
CY  - New York
PB  - John Wiley
KW  - Engineering graphics
KW  - Design, Industrial
ER  -