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Line 111:
*https://www.chijournal.org/C417 (undersized)
*https://www.chijournal.org/C417 (undersized)
*https://www.unh.edu/unhsc/sites/unh.edu.unhsc/files/STONE%20THESIS%20FINAL.pdf (modified biomedia)
*https://www.unh.edu/unhsc/sites/unh.edu.unhsc/files/STONE%20THESIS%20FINAL.pdf (modified biomedia)
*http://www.mdpi.com/2073-4441/5/1/13/htm (cold climate)