Chicago: Riteway Publishing Company, 1932. Paperback. 7 pp. 8x11 stapled pamphlet with mailing tri-fold, printed wrappers. Worn, wrappers split and loose, fore-edge tears along trifolds, unmarked. A brief, scientific and mathematical treatise on betting horses promising unprecedented accuracy and sure profits.
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Corpus Christi, Texas: Ralph King, 1945. Comb Binding. 20 pp. Oblong 8x11 with comb binding and printed paper wraps. Bi-fold mailing crease. 3 dual-column typeset pages of introductory treatise on the method followed by 17 pages of hand-written charts. One 8x11 typed cover letter printed front and back with additional.....