The Minor Prophets: Joel - Historical and spiritual overview of the Biblical prophet. - http://www.zianet.com/maxey/Proph6.htm
Prophecies of Joel - Two of the prophet's predictions, with biblical links and discussion about their fulfillment from a Christian perspective. - http://www.aboutbibleprophecy.com/joel.htm
Joel - Profile of the prophet from a joint Lutheran and Catholic bible study project. - http://www.aboutbibleprophecy.com/p29.htm
Catholic Encyclopedia: Joel - Commentary on the Biblical prophet from the traditional Catholic perspective. - http://www.newadvent.org/cathen/08419a.htm
Jewish Encyclopedia: Joel - Overview of the prophet from the traditional Jewish perspective. - http://www.jewishencyclopedia.com/view.jsp?artid=340&letter=J
Book of Yoal - The text of the Biblical chapters in Hebrew and English. - http://www.hareidi.org/bible/Joel.htm