Pete Smith writes:

https://familysearch.org/
http://www.rootsweb.ancestry.com/
http://www.ancestry.com/
http://catalog.loc.gov/
http://www.hclib.org/
http://www.ha.com/
http://legacy.stacks.com/

Pete adds:

Ed Hohertz writes:

1. World Catalog: (available at home through connection from the local library) catalogs all the books from cooperating libraries around the world and lists the libraries where they may be found. Also gives web sources where appropriate.http://www.worldcat.org/

2. Google, Google Books and Google Scholar. Sounds like they would give the same results, but they do not.www.google.com,books.google.com,scholar.google.com.

3. JSTOR: (available at home through connection from the local library) Another means of searching for articles on-line.www.jstor.org

4. ANS Library: Excellent source on finding published material.donum.numismatics.org/cgi-bin/koha/opac-search.pl

5. Academia.edu: a good source for newer academic articles, if the author participates.academia.edu

6. Digital library Nummis: Huge selection of on-line articles and books (mostly older because of copyright issues) for coins of every era and continent (except Antarctica!).members.ziggo.nl/tverspag/NUMIS/

7. Dialnet: Great resource for academic material published in Spain.dialnet.unirioja.es/servlet/buscador

8. Converting AH and AD Dates: www.muslimphilosophy.com/ip/hijri.htm

9, 10: Koran/Quran search sites: www.quranbrowser.comand www.searchtruth.com/search.php?keyword=%D8%B3%D8%A8%D8%AD%D9%
86+&chapter=&translator=1&search=1&start=0&records_display=10&search_word=all

To read the earlier E-Sylum article, see:SURVEY: WEB RESOURCES MOST USED BY NUMISMATIC WRITERS(www.coinbooks.org/esylum_v16n06a12.html)