TY  - BOOK
AU  - Indian Standards Institution
TI  - Specification for Engineers Drawing Instruments Curve Pens (IS : 5737 - 1970)
U1  - IS : 5737 - 1970 
PY  - 1971///
CY  - New Delhi
PB  - Indian Standards Institution
KW  - Indian Standard - IT
N1  - IS : 5737 - 1970
ER  -