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Title: Two photometers by JENNEN, marked 39G and 34G [Go to resource]
Description: Two photometers by JENNEN, marked 39G and 34G License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: photometer Source: Science Museum Creator: Jennen (maker) Identifier: 1995-817 Go to resource More Like this...
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