. . "Taxation of natural resources, with special reference to severence taxes a bibliographical list of writings"@en . . . . "Bibliography"@en . . . . . . . . . "Taxation of natural resources, a bibliographical list"@en . . "Taxation of natural resources, with special reference to severance taxes : a bibliographical list of writings"@en . "Severance taxes"@en . "Taxation of natural resources, with special reference to severance taxes : a bibliographical list of writings" . . . . .