RS ISO 787-25: 2019 GENERAL METHODS OF TEST FOR PIGMENTS AND EXTENDERS — PART 25: COMPARISON OF THE COLOUR, IN FULL-SHADE SYSTEMS, OF WHITE, BLACK AND COLOURED PIGMENTS — COLORIMETRIC METHOD
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Rwanda Standards
RS ASTM D5059-21 STANDARD TEST METHOD FOR LEAD AND MANGANESE IN GASOLINE BY X-RAY SPECTROSCOPY
