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2. Jerdrzej Sniadecki (1768-1838) on the cure of rickets (1840); cited in Mozolowski W;Sniadecki;Nature,, 1939
3. The geographical distribution and aetiology of rickets;Palm;Practitioner,, 1890
4. Heilung von Rachitis durch Kunstliche Hohensonne;Huldschinsky;Dtsch Med Wochenschr,, 1919