Bjerve, Petter Jakob Economically active population in Norway 1875-1960 and forecasts up to 1970 / Petter Jakob Bjerve - Oslo : Central Bureau of Statistics (CBS) , 1964 - 56p. : ill. ; 23 cm. - Norwagian text . Includes bibliographical references and index. Subjects--Topical Terms: Labour--Norway Dewey Class. No.: 331.9481 / BJE