Efraim and Menashe - A rabbinic reinterpretation of the favoritism Jacob shows his grandsons. - http://www.midreshetharova.org.il/onlinetorah/archive/breishit/vayechi5761.php
Manasseh - Profile of the son of Joseph from a joint Lutheran and Catholic bible study project. - http://www.aboutbibleprophecy.com/p132.htm
Catholic Encyclopedia: Manasses - Commentary on the son of Joseph from the traditional Catholic perspective. - http://www.newadvent.org/cathen/09583c.htm
Jewish Encyclopedia: Manasseh - Overview of the son of Joseph from the traditional Jewish perspective, including rabbinic commentary. - http://www.jewishencyclopedia.com/view.jsp?artid=124&letter=M