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Weyhenmeyer, C. E.; Burns, S.J.; Waber, Niklaus; Aeschbach-Hertig, W.; Kipfer, R.; Loosli, H.H.; Matter, Albert (2000). Cool Glacial Temperatures and Changes in Moisture Source Recorded in Oman Groundwaters. Science, 287(5454), pp. 842-845. American Association for the Advancement of Science 10.1126/science.287.5454.842