Bild:Udo Adelsberger an der Quartzuhr PTR1938.jpg

[edit] Summary

Dr. de:Udo Adelsberger an der de:Quarzuhr, de:Physikalisch-Technische Reichsanstalt 1938

Dr. Udo Adelsberger with a quartz clock, Physikalisch-Technische Reichsanstalt 1938

© Dr. Klaus Adelsberger, de:Neckargemünd; BGKS Kulms, Editor --Bgks 11:23, 2 February 2006 (UTC)

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I, the author of this work, hereby publish it under the following license: This file is licensed under the Creative Commons Attribution ShareAlike 2.5 License. In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it only under a license identical to this one. Official license