File:P Kolbe-14 TEF-equipment 01.jpg

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Description
English: Hellmuth Kolbe and Hans Leonhard at the Ratsaal (parliament room) in Zug, Switzerland, in ca. 1980, with Kolbe’s early TDS/TEF measuring equipment, performing acoustics measurements.
Date circa 1980
date QS:P,+1980-00-00T00:00:00Z/9,P1480,Q5727902
Source Sent to me personally.
Author Hans Leonhard
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Public domain This work has been released into the public domain by its author, Hans Leonhard. This applies worldwide.
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current13:31, 5 March 2013Thumbnail for version as of 13:31, 5 March 20131,562 × 1,081 (547 KB)Schneidex{{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|Hellmuth Kolbe and Hans Leonhard at the Ratsaal (parliament room) in Zug, Switzerland, in ca. 1980, with Kolbe’s early TDS/TEF measuring equipment, performing acoustics measu...
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