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Laurie, P. 1923. The Pigments used in Painting ’The Rosslyn Missal’ in the Advocates’ Library, and the Celtic Psalter, D.p.111,8, in the Library of the Univberrsity of Edinburgh. Proceedings of the Society of Antiquaries of Scotland. 57, (Nov. 1923), 41–45. DOI:https://doi.org/10.9750/PSAS.057.41.45.