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Vallonia perspectiva Sterki, 1893 Thin-lip Vallonia |
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Bardstown, Nelson Co., Kentucky (2.1 mm.). Digital images by David Kirsh. |
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Scanning Electron Micrographs (SEM) Of Arizona Specimens |
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| Coronado National Forest, Cochise County, Arizona. SEMs produced by H. G. Lee in collaboration with Dr. Ann Heatherington, Dept. Geological Sciences, University of Florida, Gainesville, FL. |
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