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“THE TECHNIQUE OF MIXING THE PRIMARY COLORS OF OIL PAINTS WITH EACH OTHER, AS WELL AS WITH THE USE OF CERTAIN TYPES OF SOLVENTS AND OILS”. American Journal of Research in Humanities and Social Sciences 14 (July 10, 2023): 35–38. Accessed September 30, 2026. https://americanjournal.org/index.php/ajrhss/article/view/1062.