Bjerkgard, T.; Cousens, B. L.; Franklin, J. M. (2000): The Middle Valley sulfide deposits, northern Juan de Fuca Ridge; radiogenic isotope systematics. Economic Geology Publishing Company, Lancaster, PA, United States, Economic Geology and the Bulletin of the Society of Economic Geologists, 95 (7), 1473-1488, georefid:2001-007886