Adolf von Harnack - A biography of Adolf von Harnack from the Dictionary of Modern Western Theology. www.bu.edu/wwildman/WeirdWildWeb/courses/mwt/dictionary/mwt_themes_680_harnack.htm
Marcion - An excerpt from Adolf von Harnack's, "History of Dogma." www.webcom.com/~gnosis/library/marcion/Harnack.html
