TY  - BOOK
AU  - Helsel, Jay D
AU  - Svensen, C. L
AU  - French Thomas E
TI  - Mechanical drawing
SN  - 0070223130
AV  - T 353 Mec 
PY  - 1980///
CY  - New York
PB  - MacGraw-Hill
KW  - MECHANICAL DRAWING
KW  - DESIGN
ER  -