- Abraham Lincoln's Philosophy of Common Sense - by Edward J. Kempf, M.D
- Abraham Lincoln's Organic & Emotional Neurosis - by Edward J. Kempf, M.D.
- Artifact Description of the Kaplan Daguerreotype - by Grant B. Romer
- The Origin of the Kaplan Daguerreotype - by Albert Kaplan
- Abraham Lincoln, The Physical Man - by Albert Kaplan
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