Mémoire sur les niveaux-cercles / Lenoir neue Tacheometer aus dem Reichenbach'-schen mathematisch-mechanischen Institute T. Ertel u. Sohn in München / F. Kreuter Wagner-Fennel'schen Tachymeter der Fabrik geodätischer Instrumente von Otto Fennel Söhne in Cassel / A. Fennel Instrument flying : instruction book / Howard C. Stark technical regulations General : field music; instruments / prep. under dir. of the Commandant, the Army Music School aus natur und geisteswelt optischen Instrumente : (Lupe, Mikroskop, Fernrohr, photographisches Objectiv und ihre verwandte Instrumente) / Moritz von Rohr war department technical manual Binaural training instruments, M 1 and M 2 : ordnance maintenance / prepared under direction of the chief of ordnance war department technical manual Flank spotting instrument M 1 : flank spotting rule M 1 : ordnance maintenance war department technical manual Azimuth instrument M 1918 : ordnance maintenance Geodätische Instrumente / von Adolf Fennel training regulations Topography and surveying / War Department : Care and adjustment of instruments / War Department pamphlet Directions for the use of artillery instruments : The slide rule
