TY  - BOOK
AU  - Singh, Gurcharan
AU  - Singh, Jagdish
TI  - Textbook of engineering drawing 
U1  - 604.2 SI617t 1997 
CY  - Delhi
PB  - Standard Publishers, 1997.
KW  - Engineering drawing
KW  - Geometrical constructions
KW  - Mechanical drawing
ER  -