Dahl, P., Holm, D., Gardner, E., Hubacher, F., & Foland, K. (1999). New constraints on the timing of Early Proterozoic tectonism in the Black Hills (South Dakota), with implications for docking of the Wyoming province with Laurentia. Geological Society of America Bulletin. https://doi.org/10.1130/0016-7606(1999)111<1335:NCOTTO>2.3.CO;2
Dahl, Peter, Daniel Holm, Edward Gardner, Fritz Hubacher, and Kenneth Foland. 1999. “New Constraints on the Timing of Early Proterozoic Tectonism in the Black Hills (South Dakota), With Implications for Docking of the Wyoming Province With Laurentia”. Geological Society of America Bulletin. https://doi.org/10.1130/0016-7606(1999)111<1335:NCOTTO>2.3.CO;2.
Dahl, P., D. Holm, E. Gardner, F. Hubacher, and K. Foland. New Constraints on the Timing of Early Proterozoic Tectonism in the Black Hills (South Dakota), With Implications for Docking of the Wyoming Province With Laurentia. Geological Society of America Bulletin, 1 Sept. 1999, doi:10.1130/0016-7606(1999)111<1335:NCOTTO>2.3.CO;2.