Threlfall, John Brooks. The Ancestry of Thomas Bradbury (1611-1695) and His Wife Mary (Perkins) Bradbury (1615-1700) of Salisbury, Massachusetts, Madison, Wisconsin: J.B. Threlfall (1988); ASIN B0006EVZOA Bradbury, John Merrill, Bradbury Memorial: Records of Some of the Descendants of Thomas Bradbury of Adamenticus, York, 1634 also of Salisbury, Massachusetts, 1638, 1890 Perkins Family History (hand-written documents, written at various dates from the 17th century-present - Des Plaines, Illinois)