Chinner, Graham (16 September 2005). "Yoder , H. S., J R . 2005. Centennial History of the Carnegie Institution of Washington. Volume III: The Geophysical Laboratory". Geological Magazine. 142 (4): 457. doi:10.1017/S0016756805211159. S2CID197534591.
Chinner, Graham (16 September 2005). "Yoder , H. S., J R . 2005. Centennial History of the Carnegie Institution of Washington. Volume III: The Geophysical Laboratory". Geological Magazine. 142 (4): 457. doi:10.1017/S0016756805211159. S2CID197534591.