71![](https://www.pdfsearch.io/img/234f4fc2acc7f927d6d0a998cf17676c.jpg) | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2007-10-18 15:58:22
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72![](https://www.pdfsearch.io/img/e6c229f4410f8c78ab6aea59bcfc996d.jpg) | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2011-02-28 16:08:34
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73![](https://www.pdfsearch.io/img/81bd3646b91ff62a4068717283872dc0.jpg) | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-03-17 14:34:49
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74![](https://www.pdfsearch.io/img/73666ad8e6f9f4781147d956116d3d6c.jpg) | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-09-23 18:47:30
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75![](https://www.pdfsearch.io/img/f2fc0f30e8f4d94de7e63513763b2caa.jpg) | Add to Reading ListSource URL: eps.mcgill.caLanguage: English - Date: 2007-01-10 11:40:10
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76![](https://www.pdfsearch.io/img/a184d6a7e467ea71129574f4d44ba76c.jpg) | Add to Reading ListSource URL: www.eri.u-tokyo.ac.jpLanguage: English - Date: 2003-06-25 03:44:04
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77![](https://www.pdfsearch.io/img/f6df185205b7a24e2cd29a1ab97b5559.jpg) | Add to Reading ListSource URL: www.blm.govLanguage: English - Date: 2013-10-01 17:52:53
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78![](https://www.pdfsearch.io/img/6d08d5fe51c87dc4d0cd019472f484b9.jpg) | Add to Reading ListSource URL: ees2.geo.rpi.eduLanguage: English - Date: 2000-12-20 12:03:26
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