Preservation guidance on matting and framing works of art on paper and other flat paper-based items, including photograph prints.
Cornell University Library Conservation
Preservation Self-Assessment Program (PSAP)
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BPG Matting and Framing - MediaWiki
Framing a 1969 moon landing newspaper - collectSPACE: Messages
Preservation Research National Film Preservation Board
Personal and Family Treasures (December 2000) - Library of
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Calaméo - JOURNAL OF FILM PRESERVATION #101, OCTOBER 2019
Preservation Guidelines For Matting And Framing Collections Care (Preservation, Library Of Congress)