Barck,Oscar Theodore
Since 1900 : a history of the United States in our Times/Oscar Theodore Barck, Nelson Manfred Blake
Macmillan, 1950
 Buku Teks SO
Barck, Oscar Theodore, Jr., 1902-1993
Since 1900 a history of the United States in our times Oscar Theodore Barck, Jr. and Nelson Manfred Blake
New York, N.Y. Macmullan c.1965,
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Link, Arthur S.
American epoch : a history of the United States since the 1890's
Alfreda A. Knopf, 1955
 Buku Teks SO
Link, Arthur S.
American epoch : a history of the United States since the 1890's
Alfreda A. Knopf, 1963
 Buku Teks SO
Link, Arthur S.
American epoch : a history of the United States Since the 1890's
Alfred A. Knopf, 1963
 Buku Teks SO