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1.
Théorie des courbes terminales du spiral, par F. Keelhoff ... by Series: Mémoires de la Classe des sciences. Collection in-8o ; ; 2. sér.
Material type: Text Text; Format: print ; Literary form: Not fiction
Publisher: [Bruxelles] [M. Lamertin, M. Hayez], [1921]
Availability: Items available for loan: Jost Bürgi Library (1)Call number: TS548 .K44 1921.
2.
Theory of terminal curves for the hairspring / F. Keelhoff ; translated by G. Droz and William O. Bennett. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English Original language: French Publisher: Lancaster, PA : Hamilton Watch Company, 1933.
Availability: Items available for loan: Jost Bürgi Library (1)Call number: TS548 .K44 1933.
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