Daugherty, Carrol R.
The labor problems of American society
Houghton Mifflin, 1952
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Quint, Howard H
Main problems in American history
Dorsey Press, 1968
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Mansfield, Edwin
Economic problems : principles, problems, decisions
W.W. Norton, 1974
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Williamson, Harold F.
The growth of the American economic
Prentice-Hall, 1951
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Krooss, Herman Edward, 1912-1975
American economic development
Prentice-Hall, 1955
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