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2.
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3.
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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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11.
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12.
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13.
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14.
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15.
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16.
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17.
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18.
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19.
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20.
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21.
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22.
Staz, J.: Dental Caries in South Africa, South African J. M. Sc. 3: 1-63, 1938 (Suppl.) pp. 37-38.
23.
Idem: Bands of Schreger , J. D. Res. 25: 373-80, 1946.
24.
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25.
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26.
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27.
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28.
Walkhoff, O.: Die normale Histologie menschlicher Zahne, Leipzig, 1901, Felix.
29.
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