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- Beveridge , Albert J. 1928 . Abraham Lincoln , Vol II , 192 – 195 . New York : standard library edition, Hough‐ton Mifflin .
- Murry , J. Middleton . 1930 . The Problem of Style , 3 – 8 . Oxford University Press .
- Oliver , Robert T. 1937 . Oratory of Burke, Fox, Sheridan, and Pitt , 87 – 88 . University of Wisconsin . Unpublished doctoral dissertation
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- Carr , Clark E. 1909 . Stephen A. Douglas , 187 – 217 . Chicago : A. C. McClurg & Co. .
- June 14 1861 . Jacksonville Sentinel June 14 , Jacksonville, Illinois
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- 1858 . Illinois State Journal , Oct. 12 Springfield, Illinois
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- Hellman , Hugo E. 1938 . The Greatest American Oratory . Q.J.S. , xxiv ( 1 ) Feb. : 36 – 39 .
- Berry , Mildred F. 1937 . Abraham Lincoln of Sangamon; The Evolution of an Oral Style 31 Accepted for publication
- This study was made and this paper written under the direction of Dr. Mildred Freburg Berry.
Quarterly Journal of Speech
Volume 25, 1939 - Issue 1