RT @rockdoc11: One of the reasons @USGS is great - they publish some of their field trip guides For example: several of the trips from the…
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RT @rockdoc11: One of the reasons @USGS is great - they publish some of their field trip guides For example: several of the trips from the…
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RT @rockdoc11: One of the reasons @USGS is great - they publish some of their field trip guides For example: several of the trips from the…
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One of the reasons @USGS is great - they publish some of their field trip guides For example: several of the trips from the IAVCEI 2017 general assembly https://t.co/mdSHlDnsyW