"Truth, the Basis of Virtue," advertisement for Wilshire's I-ON-A-CO, San Francisco. Wilshire I-ON-A-CO correspondence, p. 2, The Iona Company, folder 0403-13. Courtesy of the American Medical Association Archives.
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- Fig. 21. "Truth, the Basis of Virtue," advertisement for Wilshire's I-ON-A-CO, San Francisco. Wilshire I-ON-A-CO correspondence, p. 2, The Iona Company, folder 0403-13. Courtesy of the American Medical Association Archives.