File:PSM V41 D048 Echo cave on the rio san juan.jpg

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Description Echo cave on the Rio San Juan
Date
Source Popular Science Monthly Volume 41
Author Unknown authorUnknown author
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Extracted image from book, to grayscale, cropped whitespace. Modifications made by Ineuw. The original can be found here: Popular Science Monthly Volume 41.

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Date/TimeThumbnailDimensionsUserComment
current04:24, 22 November 2015Thumbnail for version as of 04:24, 22 November 20151,789 × 1,346 (724 KB)IneuwCleaned image and improved contrast
00:16, 20 December 2010Thumbnail for version as of 00:16, 20 December 20101,780 × 1,349 (869 KB)Ineuw{{Information |Description = Echo cave on the Rio San Juan |Source = [http://www.archive.org/details/popularsciencemo41newy Popular Science Monthly Volume 41] |Date = 1892 |Author = Unknown |Permission = {{PD-old}} |
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