Richard Bennett of Berean Beacon http://www.bereanbeacon.org, examines the "Immaculate Conception" of Mary in the video below. He also has a print articles titled "The Biblical Mary and Tradition" and "Pope Benedict XVI at Lourdes: A Descent Into Darkness" at: http://www.bereanbeacon.org/articles/sorted/01_On_Catholicism/The_Biblical_Mary_and_Tradition.pdf and http://www.bereanbeacon.org/articles/sorted/01_On_Catholicism/Pope_Benedict_XVI_at_Lourdes.pdf
Reformed Baptist apologist/debater James White from Alpha & Omega Ministries http://aomin.org, discusses the apparitions of Mary (even in window smudges):
