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Marigene H. Butler, An Investigation of Pigments and Technique in the Cezanne Painting, "Chestnut Trees", Bulletin of the American Institute for Conservation of Historic and Artistic Works, Vol. 13, No. 2, Papers Presented at the First Annual Meeting. American Institute for the Conservation of Historic and Artistic Works, Inc. (Apr., 1973), pp. 77-85
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Marigene H. Butler (1973) studied this question.
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