Freeman, Margaret B. (December 1956). "A Book of Hours for the Duke of Berry". The Metropolitan Museum of Art Bulletin. 15 (1): 93–101. doi:10.2307/3257709. JSTOR3257709.
Freeman, Margaret B. (December 1956). "A Book of Hours for the Duke of Berry". The Metropolitan Museum of Art Bulletin. 15 (1): 93–101. doi:10.2307/3257709. JSTOR3257709.