Directory Resources On the Internet 2021
https://www.zillman.us/subject-tracers/directory-resources/
http://www.DirectoryResources.info/

The above is a white paper link dataset compilation of the Directory Resources On the Internet 2021 Subject Tracer™ Information Blog by Internet Expert Marcus P. Zillman, M.S., A.M.H.A. This Directory of Directories covers all the competent and well maintained directories available from the Internet and makes for an excellent alternative search resource! It is now a 32-page .pdf document (767KB). [Completely updated including all links validated on January 20, 2021] Other white papers are available by clicking here.