USA Museums and Research facilities
The National Association of Watch And Clock Collectors
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National Watch and Clock Museum
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American Clock and Watch Museum
https://www.clockandwatchmuseum.org/
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Hoffman Clock Museum
https://www.hoffmanclockmuseum.org/1/index.htm?
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Halim Time and Glass Museum
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Smithsonian Institution
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Nawcc Research Library
https://www.nawcc.org/research/
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NAWCC Bulletin Articles
June 1999, Vol., 41/3, Number 320
"The evolution of the Vienna Regulator" P293-314, Philip J. Rasch
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June 2006, Vol., 48/3 Number 362
"Christian Huygens, the Pendulum, and the Cycloid" Alan Emmerson
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April 2007, Vol., 49/2 Number 367
"The Clocks of Central Europe - Part Two" P150-162, Philip J. Rasch
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Books and Publications
F.H. van Weijdom Claterbos, Viennese Clockmaker and What They Left Us, Interbook International B.V., 1979
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Frederick Kaltenbock, Viennese Timpieces, Verlag, 1993
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Rick Ortenberger, Vienna Regulators and Factory Clocks, Schiffer Publishing, Ltd., 1990.
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