Carl Adolf Martienssen (1881-1955)
Sonaten für Klavier zu zwei Händen
Leipzig: C.F. Peters, 1937, plate 11261
Public Domain [tag/del]
Reprinted by Kalmus/Belwin (now Alfred). Also present in CDSM collection.
Scan: score scanned at 600dpi. You may ask me for a manually cleaned version.
filter: score filtered with 2-point algorithm explained in High Quality Scanning
I provide the original scanned version and the filtered, because the filter does some changes (smoothening, sharpening borders) and some portions of the scan get lost sometimes (when they are to small e.g.) - so you can choose your favorite.