Philosophisches Jahrbuch - Algunos números

Philosophisches Jahrbuch, v. 13-14, 1900
http://books.google.com/books?id=qesPAAAAYAAJ

Philosophisches Jahrbuch, v. 15-16, 1902
http://books.google.com/books?id=UewPAAAAYAAJ

Philosophisches Jahrbuch, v. 17-18, 1904
http://books.google.com/books?id=LO0PAAAAYAAJ

Philosophisches Jahrbuch, v. 19-20, 1906
http://books.google.com/books?id=6O0PAAAAYAAJ

Philosophisches Jahrbuch, v. 21, 1908
http://books.google.com/books?id=PO4PAAAAYAAJ