411 REFERENCE · Wikibooks
Chemical Information Sources/CIIM/Chemical Subject Searching
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Chemical Information Instructional Materials
Hierarchies of General Subjects CA Index Guide Appendix I 1994 (Stanford)
Index to Some Library of Congress Classification Numbers Relevant to Chemistry (Wiggins, Indiana)
CAS Roles