Hiebert, Erwin N. [Historian of physics at Harvard. SGB first encountered him when SGB participated in his graduate seminar during SGB's stay at Harvard in the mid-1960s; at that time SGB and EH had a mutual interest in Ernst Mach and history of thermodynamics.] -- NOTE: Letters on Emil Wiechert and the discovery of the earth's core; EH's work on conservation of energy; SGB's appointment to UMCP; SGB's Selected Readings in Physics volumes., 1965-1979

Hiebert, Erwin N. [Historian of physics at Harvard. SGB first encountered him when SGB participated in his graduate seminar during SGB's stay at Harvard in the mid-1960s; at that time SGB and EH had a mutual interest in Ernst Mach and history of thermodynamics.] -- NOTE: Letters on Emil Wiechert and the discovery of the earth's core; EH's work on conservation of energy; SGB's appointment to UMCP; SGB's Selected Readings in Physics volumes., 1965-1979, 2.5.6, Box: 5, Folder: 6.0. Stephen G. Brush papers, 0294-UA. Special Collections and University Archives. https://archives.lib.umd.edu//repositories/2/archival_objects/286592 Accessed June 13, 2024.