TY  - RPRT
TI  - Geomagnetic polarity epochs: new data from Olduvai Gorge, Tanganyika
AU  - C. S. Grommé
AU  - R. L. Hay
PY  - 1967
DO  - 10.1016/0012-821x(67)90110-0
UR  - https://pubs.usgs.gov/publication/70010622
ID  - 70010622
ER  -