| http://www.w3.org/ns/prov#value | - The Library continues to add material to its files, including articles, biographies, bibliographies, photographs, reviews, small catalogs, invitations, and correspondence.Extensive research includes documentation of gallery and private collections including Kleemann Galleries, Durand-Ruel Galleries, Valentine Galleries, Ferargil, Inc., Andrew Kelly and Joseph Hirshhorn.
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