TY - RPRT TI - Geomagnetic polarity epochs: A new polarity event and the age of the Brunhes-Matuyama boundary AU - Richard R. Doell AU - G. B. Dalrymple PY - 1966 DO - 10.1126/science.152.3725.1060 UR - https://pubs.usgs.gov/publication/70010736 ID - 70010736 ER -