Catholic Encyclopedia: Litany of Loreto - Long article examines the somewhat murky history of the Litany of Loreto. Also information on Marian litanies in general. - http://www.newadvent.org/cathen/09287a.htm
Litany of the Blessed Virgin Mary - Also known as the Litany of Loreto. After the Kyrie and invocation of the Trinity, calls on Mary under many of her titles to intercede for us. - http://www.catholic-forum.com/saints/litany09.htm
Litany of Our Lady of Seven Sorrows - Prayers relying on Mary's compassion for those in distress. - http://www.catholic-forum.com/saints/litany02.htm