Sprain, Courtney J., Renne, Paul R., Clemens, William A., and Wilson, Gregory P. Calibration of chron C29r: New high-precision geochronologic and paleomagnetic constraints from the Hell Creek region, Montana. Retrieved from https://par.nsf.gov/biblio/10082831. GSA Bulletin 130.9-10 Web. doi:10.1130/b31890.1.

Sprain, Courtney J., Renne, Paul R., Clemens, William A., & Wilson, Gregory P. Calibration of chron C29r: New high-precision geochronologic and paleomagnetic constraints from the Hell Creek region, Montana. GSA Bulletin, 130 (9-10). Retrieved from https://par.nsf.gov/biblio/10082831. https://doi.org/10.1130/b31890.1

Sprain, Courtney J., Renne, Paul R., Clemens, William A., and Wilson, Gregory P. "Calibration of chron C29r: New high-precision geochronologic and paleomagnetic constraints from the Hell Creek region, Montana". GSA Bulletin 130 (9-10). Country unknown/Code not available. https://doi.org/10.1130/b31890.1. https://par.nsf.gov/biblio/10082831.

@article{osti_10082831,
place = {Country unknown/Code not available}, title = {Calibration of chron C29r: New high-precision geochronologic and paleomagnetic constraints from the Hell Creek region, Montana}, url = {https://par.nsf.gov/biblio/10082831}, DOI = {10.1130/b31890.1}, abstractNote = {}, journal = {GSA Bulletin}, volume = {130}, number = {9-10}, author = {Sprain, Courtney J. and Renne, Paul R. and Clemens, William A. and Wilson, Gregory P.}, }