. . . . . . "The rapids and the pools - Grand Canyon: Chapter D in The Colorado River region and John Wesley Powell"@nl . . "The rapids and the pools - Grand Canyon: Chapter D in The Colorado River region and John Wesley Powell"@nl . . . "Chapter D in The Colorado River region and John Wesley Powell"@en . . . "\u043D\u0430\u0443\u043A\u043E\u0432\u0430 \u0441\u0442\u0430\u0442\u0442\u044F, \u043E\u043F\u0443\u0431\u043B\u0456\u043A\u043E\u0432\u0430\u043D\u0430 \u0432 1969"@uk . . "131-145" . "The rapids and the pools - Grand Canyon"@en . "The rapids and the pools - Grand Canyon"@en . . . . "wetenschappelijk artikel"@nl . "10.3133/PP669D" . . "The rapids and the pools - Grand Canyon: Chapter D in The Colorado River region and John Wesley Powell (Professional Paper 669)"@en . "article"@en . "The rapids and the pools - Grand Canyon"@en . "The rapids and the pools - Grand Canyon"@en . "1969-01-01T00:00:00Z"^^ . . "The rapids and the pools - Grand Canyon: Chapter D in The Colorado River region and John Wesley Powell"@nl .