CONCEPT OF THE GRADED RIVER (Q61031120)
scholarly article
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(P31) (Q13442814)
(P304) 463
(P407) (Q1860)
(P433) 5
(P478) 59
(P577) +1948-00-00T00:00:00Z
(P1433) (Q15756592)
(P1476) "CONCEPT OF THE GRADED RIVER" (language: en)
(P2093) J. HOOVER MACKIN
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