Roy, A. (1999). The National Gallery Van Dycks: Technique and Development. Technical Bulletin.
Chicago-Zitierstil (17. Ausg.)Roy, Ashok. "The National Gallery Van Dycks: Technique and Development." Technical Bulletin 1999.
MLA-Zitierstil (8. Ausg.)Roy, Ashok. "The National Gallery Van Dycks: Technique and Development." Technical Bulletin, 1999.
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