. . "Geschichte Anfänge-1909" . . "Geschichte Anfänge-1909." . "History of the logarithmic slide rule" . "History of the logarithmic slide rule"@en . . . . . "Gunter's scale and the slide rule during the seventeenth century"@en . "Gunter's scale and the slide rule during the seventeenth century" . . "A history of the logarithmic slide rule and allied instruments, and On the history of Gunter's scale and the slide rule during the seventeenth century"@en . "A history of the logarithmic slide rule and allied instruments, and On the history of Gunter's scale and the slide rule during the seventeenth century" . "History"@en . . . . "Logarithmic slide rule and allied instruments"@en . . "Logarithmic slide rule and allied instruments" . "History of the logarithmic slide rule and allied instruments"@en . "History of the logarithmic slide rule and allied instruments" . . "A history of the logarithmic slide rule and allied instruments ; and On the history of Gunter's scale and the slide rule during the seventeenth century" . . . "Rechenschieber." . .