Evaluations of the downward velocity of soil water movement in the unsaturated zone in a groundwater recharge area using δ18 O tracer: the Kumamoto region, southern Japan
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1994 ◽
Vol 31
(6)
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pp. 273
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1981 ◽
Vol 17
(6)
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pp. 1603-1610
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2006 ◽
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1996 ◽
Vol 184
(3-4)
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pp. 153-173
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