Typed letter from A. D. Risten to Charles F., Sr., thanking Brush for sending a copy of his paper, Kinetic Theory of Gravitation III, to Risten Charles Show moreTyped letter from A. D. Risten to Charles F., Sr., thanking Brush for sending a copy of his paper, Kinetic Theory of Gravitation III, to Risten Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 3 Folder 4 Show less
Typed letter from A. D. Risten to Charles F., Sr. thanking Brush for sending his fifth paper on gravitation to Risten. Charles F. Brush, Sr., Papers Ser Show moreTyped letter from A. D. Risten to Charles F., Sr. thanking Brush for sending his fifth paper on gravitation to Risten. Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 3 Folder 3 Show less