"États-Unis. Economic development administration. Economic research (Office)" . . . . "Atlantic States" . . . . "A myth in the making : the southern economic challenge and northern economic decline"@en . "A myth in the making : the southern economic challenge and northern economic decline" . . . . . . . . . . . "A myth in the making the southern economic challenge and northern economic decline"@en . . . . . . . . . . . . . . . . "A myth in the making : the Southern economic challenge and Northern economic decline"@en . "A Myth in the making : the Southern economic challenge and Northern economic decline" . . "Middle West" . . "Economic history." . . "Southern States" . . "United States" . . "United States." . "Southwest, Old" . . "United States. Economic Development Administration. Office of Economic Research." . . "Southwest, New" . .