@book{Copleston, author = {Copleston, F.}, title = {A history of philosophy. Volume 7. Part 1. Modern Philosophy. Fichte to Hegel, New York (Image Books) 1965.}, language = {en} } @book{Copleston, author = {Copleston, F.}, title = {A history of philosophy. Volume 7. Part 2. Modern Philosophy. Schopenhauer to Nietzsche, New York (Image Books) 1965.}, language = {en} }