http://www.heritagenorth.org.uk/care-of-paper-and-photographic-collections.htm http://www.heritagenorth.org.uk/Care of paper and photographs 1 Advice sheets http://www.heritagenorth.org.uk/Care of paper and photographs 2 fact sheet http://www.heritagenorth.org.uk/Care of paper and photographs 3 materials and suppliers http://www.heritagenorth.org.uk/Care of paper and photographs 4 selected reading