"Interpreting radiometrics". Natural Resource Management. Department of Agriculture and Food, Government of Western Australia. Archived from the original on 21 March 2012. Retrieved 23 June 2014.
US Department of Commerce, National Oceanic and Atmospheric Administration. "What is glacial isostatic adjustment?". oceanservice.noaa.gov. Retrieved 18 February 2024.
Smith, George (2008), "Newton's Philosophiae Naturalis Principia Mathematica", in Zalta, Edward N. (ed.), The Stanford Encyclopedia of Philosophy (Winter 2008 ed.), Metaphysics Research Lab, Stanford University, retrieved 18 February 2024
"Interpreting radiometrics". Natural Resource Management. Department of Agriculture and Food, Government of Western Australia. Archived from the original on 21 March 2012. Retrieved 23 June 2014.