Identificationtitle(s): study. Object type: sketchbook sheet object number: rp-t-1949-668-56. Description: page 56 from a sketchbook with 32 leaves. Manufacture. Manufacturer: draftsman: marius bauer. Place of manufacture: biskra. Date: 1922. Physical characteristics: pencil. Material: paper pencil. Credit line: donation from mrs. J. Bauer-stumpff. Acquisition: donation 1949. Copyright: public domain. Date: 1922.