Books and Bookselling--19th Century 2 Booksellers and bookselling -- Pennsylvania -- Philadelphia 2 Economics--19th century 2 German Americans 2 Political scientists 2 Publishers and publishing 2 Publishing 2 more ... Publishing--19th century 2 Selling--Books 2 Auburn system 1 College teachers 1 Faculty 1 Germans 1 Knowledge 1 Pennsylvania system 1 Political science 1 Prison discipline 1 Prisons 1 Publishers and Publishing--Pennsylvania--Philadelphia--19th century 1 Publishers and Publishing--Philadelphia--19th century 1 less ...