From the Harry Ransom Center, University of Texas Conservation: Frequently asked Questions
How to Store Books Safely from the ABAA Antiquarian Blog
A list of local conservators from the NY State Archives.
Find a Professional from the American Institute of Conservation
Most of the Lloyd Sealy Library's collections' conservation needs are provided by Mitra Library Conservation LLC
Your Old Books from the Rare Book and Manuscript Section (RBMS) of ACRL
Northeast Document Conservation Center - provides many online resources on care of collections including disaster mitigation/resources
WorldCat - find out which early editions, old books exist in the worlds libraries (including those digitally available) - you can limit by publication date in the advanced search
Add All Used Books search - find old rare, out of print books
Bookshop.org - includes rare and out of print books
Booksellers certified by the ABAA [Antiquarian Booksellers Association of America]
Honey and Wax Book Collecting Prize for young women book collectors