Fraas, Mitch2023-05-232023-05-232015-06-022020-05-28https://repository.upenn.edu/handle/20.500.14332/48830Essay about the acquisition of a manuscript autograph page possibly written by a young David Rittenhouse.AstronomyalmanacEarly AmericaHistory of Science, Technology, and MedicineLibrary and Information ScienceUnited States HistoryWorking Paper