1909. No Edition Remarks. 64 pages. This is an ex-Library book. Paperback book with grey cover. Booklet inserted to first page. Full title: Untersuchungen über die Entwickelungsgeschichte der Kantischen Erkenntnistheorie. German text. Ex-Library copy, with expected inserts and inscriptions. Binding remains firm. Pages are lightly tanned throughout. Top edge of some pages uncut throughout. Paper cover has mild edgewear with curling to corners and reading creases. Light tanning to spine and edges with splits to spine edges.