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3. ALLEN, J.R.L., 1963b: Henry Clifton Sorby and the sedimentary structures of sands and sandstones in relation to flow conditions; Geologie Mijnbouw, v. 42, p. 223–228.
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5. ALLEN, J.R.L., 1967: Notes on some fundamentals of paleocurrent analysis, with reference to preservation potential and sources of variance; Sedimentology, v. 9, p. 75–88.