@book{Horkheimer, author = {Horkheimer, Max}, title = {Gesammelte Schriften, Band 15: Briefwechsel 1913-1936, ed. by Gunzelin Schmid Noerr, Frankfurt am Main (Fischer) 1995, 815 pp.}, language = {de} } @book{Horkheimer, author = {Horkheimer, Max}, title = {Gesammelte Schriften, Band 16: Briefwechsel 1937-1940, ed. by Gunzelin Schmid Noerr, Frankfurt am Main (Fischer) 1995, 791 pp.}, language = {de} }