Chapter Jayawardene, S.A.; (1976)
The Trattato d'abaco of Piero della Francesca (/isis/citation/CBB000003731/)

Book Korte, Bernhard; (1981)
Zur Geschichte des maschinellen Rechnens. Rede (/isis/citation/CBB000023188/)

Book Martin, Ernst; (1992)
The calculating machines (Die Rechenmaschinen): Their history and development. Translated and edited by Kidwell, Peggy Aldrich and Williams, Michael R. (/isis/citation/CBB000032655/)

Article Smillie, K. W.; (1979)
An historical approach to computing science (/isis/citation/CBB000016620/)

Article Williams, M. R.; (1983)
From Napier to Lucas: The use of Napier's bones in calculating instruments (/isis/citation/CBB000012774/)

Article Kidwell, Peggy A.; (1986)
James Prentice's rectancular protractor (/isis/citation/CBB000064600/)

Article Hillard, Denise; (1979)
Jacques Besson et son Théâtre des instruments mathématiques (/isis/citation/CBB000011167/)

Article Russo, Thomas A., Sr.; Schure, Conrad; (1997)
The calculating engines of Frank S. Baldwin (/isis/citation/CBB000074514/)

Book Maistrov, Leonid E.; Petrenko, Ol'ga L.; (1981)
Pribory i instrumenty istoricheskogo znacheniia: Bychislitel'nye mashiny. (Tools and instruments of historical significance: Calculating machines.) (/isis/citation/CBB000023774/)

Article Kidwell, Peggy Aldrich; (1993)
Adders made and used in the United States (/isis/citation/CBB000036804/)

Article Kidwell, Peggy Aldrich; (1994)
Ideology and invention: The calculating machine of Ramón Verea (/isis/citation/CBB000049578/)

Book (1985)
A manual of operation for the automatic sequence controlled calculator, by the staff of the Computation Laboratory (/isis/citation/CBB000045241/)

Book Collier, Bruce; (1990)
The little engines that could've: The calculating machines of Charles Babbage (/isis/citation/CBB000037688/)

Article Evans, Gillian R.; (1975)
Duc Oculum: Aids to understanding in some mediaeval treatises on the abacus (/isis/citation/CBB000010045/)

Article Kistermann, Friedrich W.; (1984)
War die Rechenmaschine von Wilhelm Schickard praktisch brauchbar? (/isis/citation/CBB000016314/)

Article Mosconi, Jean; (1983)
Charles Babbage: Vers une théorie du calcul mécanique (/isis/citation/CBB000005071/)

Article Lions, Jacques-Louis; (1991)
De la machine à calculer de Pascal aux ordinateurs (/isis/citation/CBB000028674/)

Article Evans, Gillian R.; (1977)
Difficillima et ardua: Theory and practice in treatises on the abacus, 950-1150 (/isis/citation/CBB000027157/)

Book (1985)
Proceedings of a Symposium on large-scale digital calculating machinery, 7-10 January 1947 (/isis/citation/CBB000053152/)

Chapter Folkerts, Menso; (1996)
Frühe Darstellungen des Gerbertischen Abakus (/isis/citation/CBB000075101/)