In Washington State there is a consortium (spelling?) of art work
    owned by several museums--American works on paper and the Diane
    Arbus Photo Collection.  For more information I would suggest
    that you can contact any of the following:

    Dr. Sarah Clark-Langager, Director
    Western Art Gallery, WWU
    Bellingham, WA

    Jan Olsen, Curator
    Whatcom Museum
    Bellingham (360) 676-6981

    Glenn Mason, Director
    Cheney-Cowles Museum
    Spokane, WA

    Good luck.

    John Handley