TY  - BOOK
AU  - Parr,Robert E.
TI  - Principles of mechanical design
U1  - 620.04 
PY  - 1970///
CY  - New York
PB  - McGraw-Hill
KW  - Mechanical drawing
KW  - Geometry, descriptive
KW  - Engineering drawings
N1  - Includes index
ER  -