Changes

*[http://justus.anglican.org/resources/pc/women/hapgood/ledkovsky.pdf A Linguistic Bridge to Orthodoxy: In Memoriam Isabel Florence Hapgood] - by Marina Ledkovsky. A lecture delivered at the Twelfth Annual Russian Orthodox Musicians Conference, October 7-11 1998, Washington, D.C. (PDF)

*[http://www.roca.org/OA/135/135q.htm Isabel Hapgood] - by Fr. Alexey Young (a brief biography)