File:PSM V72 D140 Chemical formula 2.png

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PSM_V72_D140_Chemical_formula_2.png (662 × 461 pixels, file size: 22 KB, MIME type: image/png)

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English: Chemical formula 2
Date
Source Popular Science Monthly Volume 72
Author Unknown authorUnknown author

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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
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current09:21, 20 January 2012Thumbnail for version as of 09:21, 20 January 2012662 × 461 (22 KB)Ineuw (talk | contribs)

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