The following have been added to the Zotero Group for Ancient World Open Bibliographies and the Ancient World Open Bibliographies Wiki.
Bibliography for Greek and Roman Hells
http://www.hell-on-line.org/BibGR.html
Bibliography for Egyptian Hell
http://www.hell-on-line.org/BibEGY.html
Bibliography for Ancient Near Eastern Hell
http://www.hell-on-line.org/BibANE.html
Bibliography for Jewish and Christian Hells
http://www.hell-on-line.org/BibJC.html
Eileen Gardiner, American Council of Learned Societies.
Last updated 2008.
This site contains a series of bibliographies on ancient conceptions of hell. Most include sections on primary sources and secondary studies. The Bibliography for Jewish and Christian Hells is by far the most detailed and lengthy; the others are quite short. Most works are in English, but there are a few in other languages.
Ancient World Open Bibliographies 