"Preliminary geologic map of the Beltsville Quadrangle, Prince Georges, Montgomery, and Howard counties, Maryland"@nl . . . . "wetenschappelijk artikel"@nl . "\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 1974"@uk . . . "Preliminary geologic map of the Beltsville Quadrangle, Prince Georges, Montgomery, and Howard counties, Maryland"@en . . . . . "Preliminary geologic map of the Beltsville Quadrangle, Prince Georges, Montgomery, and Howard counties, Maryland"@nl . . "Preliminary geologic map of the Beltsville Quadrangle, Prince Georges, Montgomery, and Howard counties, Maryland"@en . "Preliminary geologic map of the Beltsville Quadrangle, Prince Georges, Montgomery, and Howard counties, Maryland"@en . "Preliminary geologic map of the Beltsville Quadrangle, Prince Georges, Montgomery, and Howard counties, Maryland"@en . . . . "article published 1974 in Miscellaneous Field Studies Map"@en . "3691" . "Preliminary geologic map of the Beltsville Quadrangle, Prince Georges, Montgomery, and Howard counties, Maryland"@nl . "10.3133/MF582" . . "1974-01-01T00:00:00Z"^^ .