The late Peter Copeland wrote a handbook concerning analogue sound restoration. It is required reading. When Peter died in 2006, I despaired that this would ever see the light of day. In 2008-09, the British Library released it as a free PDF file available here.
The National Recording Preservation Board of the Library of Congress and the Council on Library and Information Resources March 2006 Capturing Analog Sound for Digital Preservation: Report of a Roundtable Discussion of Best Practices for Transferring Analog Discs and Tapes
Henry Wilhelm’s Wilhelm Imaging Research site also has his landmark 1993 book The Permanence and Care of Color Photographs: Traditional and Digital Color Prints, Color Negatives, Slides, and Motion Pictures available as an 80 MB PDF. I have had the book since it first came out.
Valerie Forrestal’s http://www.audioarchiving.net/ is a great bibliographic resource on preservation reformatting.
University of Washington Audio Preservation and Restoration by John R. Gibbs has been shortened and not maintained since about 2009. This link is to one of the last versions in the Internet Archive with the caveat that it is becoming more and more out of date.
Useful film and video tools: Scene Savers, Cincinnati