Books by Leonard Keene Hirshberg:
Books in the extended shelves:
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Hirshberg, Leonard Keene, 1877-: The action of light as a therapeutic agent. Motto: "Lux vos liberabit." (Snow & Farham, Printers, 1904), also by M.D. Rare Book Collection of Rush University Medical Center at the University of Chicago Stanton A. Friedberg (page images at HathiTrust)- Hirshberg, Leonard Keene, 1877-: What you ought to know about your baby (The Butterick Pub. Co., 1910), also by H. L. Mencken (page images at HathiTrust)
Find more by Leonard Keene Hirshberg at your library, or elsewhere.