TY  - GEN
AU  - Dhawan, Er. R.K.
TI  - Principles of engineering graphics and drawing: In first angle Projection 
SN  - 9788121935180
U1  - 604.2 
PY  - 2010///
CY  - New Delhi
PB  - S. chand & Company Ltd.
KW  - Engineering
ER  -