pubs.usgs.gov · manuscnpt approved for publication, november 3, 1989 are 1 800 2000 2000 1 900 1...
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- pubs.usgs.gov · Manuscnpt approved for publication, November 3, 1989 are 1 800 2000 2000 1 900 1 900 300 p D 202 so 1 00 1000 202.50 -1000 -1000 -1000 202 50 639A88 601 AOI 639A90
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