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2.
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3.
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4.
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5.
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6.
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7.
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8.
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9.
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10.
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11.
Huxley, “The Method of Science.”
12.
Johnston, “The Uganda Protectorate,” 1902.
13.
Livingstone, “Narrative of an Expedition to the Zambesi and its Tributaries,” 1854.
14.
Mecklenburg, Duke of, “From the Congo to the Niger and the Nile,”1861.
15.
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16.
MummeryHoward, “On the Distribution of the Nerves of the Dental Pulp,” Phil. Trans. Roy. Soc., Series B, ccii, p. 344.
17.
MummeryHoward, “The Microscopic Anatomy of the Teeth,” 1919, p. 251.
18.
MummeryHoward, “The Microscopic Anatomy of the Teeth,” 1919, p. 220.
19.
MummeryHoward, Trans. Liverpool and Dist. Odont. Soc., 1922.
20.
MummeryHoward, “The Nerve Supply of the Dentine,” Phil. Trans. Roy. Soc., 1912.
21.
MummeryHoward, “The Micro. Anat. of the Teeth,” p. 221. [22] Retzius, “Biologisch. Untersuch.,” iv, v, and vi.
22.
van Rippen, “Practices and Customs of the African Natives involving Dental Procedures,” Journ. Allied Dent. Soc., 1918.
23.
Römer, “Uber Sensibil. des Zahnbeins,” Deutsch. Monatschr. f. Zahn., 1899; “Uber die Path. der Zahnpulpa,” Internat. Zahn. Kong., 1919.
24.
Kömer, “Atlas der path. anat. Veränderungen der Zahnpulpa nebst Beiträgen zur normalen Anatomie von Zahnbein und Pulpa beim Menschen,” 1909.
25.
SmithElliot, “Bedrock,” 1914.
26.
Thorsen, “Den Norske Tand. Tidende,” 1917.
27.
Walkhoff, “Die Nervenfrage im Zahnbein,” Deutsch. Zahnheil., Heft 60, 1923.
28.
Werner, “The Natives of British Central Africa,” 1906.