Article Sonja Petersen (2019)
The Notebook and the Laboratory – Types of Knowledge in German Piano-making, 1880–1930. History and Technology (pp. 58-80). (/isis/citation/CBB178123492/) unapi

Article Petersen, Sonja (2013)
Craftsmen-Turned-Scientists? The Circulation of Explicit and Working Knowledge in Musical-Instrument Making, 1880--1960. Osiris: A Research Journal Devoted to the History of Science and Its Cultural Influences (p. 212). (/isis/citation/CBB001320390/) unapi

Article Sonja Petersen (2011)
Piano Manufacturing between Craft and Industry: Advertising and Image Cultivation of Early 20th Century German Piano Production. Icon: Journal of the International Committee for the History of Technology (pp. 12-30). (/isis/citation/CBB990236973/) unapi

Book Petersen, Sonja (2011)
Vom “Schwachstarktastenkasten” und seinen Fabrikanten Wissensräume im Klavierbau 1830 bis 1930. (/isis/citation/CBB001420941/) unapi