2020-04-271991"Appendix 2: The acidic and brittle paper problem and its solutions" in "Preserving Harvard's retrospective collections". Harvard Library Bulletin 2 (2), Summer 1991:0017-8136http://nrs.harvard.edu/urn-3:HUL.InstRepos:42661752en-US"Appendix 2: The acidic and brittle paper problem and its solutions" in "Preserving Harvard's retrospective collections"Journal Article2020-04-27