[1] |
J. Harvey
Harvey Harmonic Analyser. Reprinted from "ENGINEERING", Dec. 21, 1934. Alfred J. Amsler & Co. Schaffhouse Switzerland (1934). |
[2] |
Alfred J. Amsler & Co.
Amsler's Harvey Harmonic Analyser. Alfred J. Amsler & Co. Schaffhouse (Switzerland). |
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[3] |
Alfred J. Amsler & Co.
Amsler's Harvey Harmonic Analyser. Description and Instruction. Schaffhouse Switzerland (1937). |
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[4] |
Alfred J. Amsler & Co.
Amsler's Harvey Harmonic Analyser. Instrument used as Analyzer. Drawing No. 28883/317. Schaffhouse (1937). |
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[5] |
Alfred J. Amsler & Co.
Amsler's Harvey Harmonic Analyser. Instrument used as Integrator. Drawing No. 28312/317. Schaffhouse (1937). |
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