"MSP_Brochure_2014Web.pdf". Montana State Parks. 2014. Archived from the original on 2017-11-29. Retrieved 28 November 2017. Giant Springs flows at 156 million gallons a day.
web.archive.org
"MSP_Brochure_2014Web.pdf". Montana State Parks. 2014. Archived from the original on 2017-11-29. Retrieved 28 November 2017. Giant Springs flows at 156 million gallons a day.