BCIN (Bibliographic Database of the Conservation Information Network)
https://app.pch.gc.ca/sgc-cms/bcin/index.html

Getty Conservation Institute
AATA Online
https://www.getty.edu/conservation/publications_resources/aata/index.html

ICCROM Library
https://biblio.iccrom.org/
　
Center for Conservation Science, TOBUNKEN
https://www.tobunken.go.jp/ccr/index.html