Over the years, a large inventory of papers and reports has accumulated. The documents are of course all interested collectors available. Our literature warden, Mr. Theo Henn, residing Nordendstr. 26, 13156 Berlin, Tel 030-50019533, Email:., manages the stocks and gladly granted for inquiries information.

For a fee, a reading list is to obtain, after then the order - also with fee - can be done. In addition, almost all older circulars are available as a copy.

The circular from before 1945, since hardly be originals, copies and will soon be depreciated also available. Numerous special topics were published in brochures, but they are all out of print and only available antiquarian.