Karl Schwarzschild was an astronomer and physicist.
28 microfilm reels.
Purchased ($588.00) and accessioned, 07/07/1976 (1976 964mf, 965mf).
Originals in Center for History of Physics, American Institute of Physics,Niedersächsische Staats- und Universitätsbibliothek,
The repository also holds a negative copy of microfilm.