TY  - BOOK
AU  - Indian Standards Institution
TI  - Proportions and Dimensions of Symbols for Geometrical Tolerancing Used in Technical Drawings (IS : 11158 - 1984)
U1  - IS : 11158 - 1984 
PY  - 1985///
CY  - New Delhi
PB  - Indian Standards Institution
KW  - Indian Standard - IT
N1  - IS : 11158 - 1984
ER  -