The above is a white paper link dataset compilation of the Directory Resources 2017 Subject Tracerâ„¢ 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 34 page .pdf document 258KB. [Updated July 6, 2017] Other white papers are available by clicking here.