Seismologist, most famous as the creator of the Richter Magnitude Scale which quantifies the size of earthquakes. Ballpoint signature, “Charles F. Richter 4/22 1981,” on an off-white 5 x 3 card, with a small clipped photo affixed to top left corner. In fine condition. RRAuction COA.
We use cookies on this site to improve your experience. By using this site, you accept our use of cookies. To learn more, please see our Privacy Policy.