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2. Flow tills and related deposits on some Vestspitshergen glaciers;Boulton;J. Glaciol,1968
3. Proposed genetic classification of Pleistocene glacial formations;Chamberlin;J. Geol.,1894
4. Dreimanis , A. 1974 Terminology and classification of tills or moraines currently used in Europe and North America INQU A Commission on Genesis and Lithology of Quaternasry Deposits. 16