Sprengel, Hermann, Associated date(s): 1834-1906, Letters Sprengel, Hermann,; Stenhouse, John,; Thompson, Silvanus P.; Burndy Library Manuscripts Collection (Smithsonian Libraries) Read more about Letters
Associated date(s): 1834-1906, Letters Sprengel, Hermann,; Stenhouse, John,; Thompson, Silvanus P.; Burndy Library Manuscripts Collection (Smithsonian Libraries) Read more about Letters
