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- Schoutissen, H.A.J. (author) doctoral thesis 1926
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- De Bruyne, M.F. (author) doctoral thesis 1926
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- Hannik, S. (author) doctoral thesis 1926
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- Brandsma, W.F. (author) doctoral thesis 1925
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- Dudok van Heel, J.P. (author) doctoral thesis 1925
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- Plantenga, J.H. (author) doctoral thesis 1925
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- Honig, P. (author) doctoral thesis 1925
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- Visser 't Hooft, F. (author) doctoral thesis 1925
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- Hofstede, H.W. (author) doctoral thesis 1925
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- Peppelman van Kampen, G.B. (author) doctoral thesis 1925
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- De Visser, W. (author) doctoral thesis 1925
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- Gelissen, H.C.J.H. (author) doctoral thesis 1925
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- Voskuil, B.L. (author) doctoral thesis 1925
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- Nolen, H.G. (author) doctoral thesis 1925
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- Van Dorp, J. (author) doctoral thesis 1925
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- Ter Meulen, H. (author) doctoral thesis 1925
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- Hartman, H. (author) doctoral thesis 1925
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- Zeijlmans van Emmichoven, C.P.A. (author) doctoral thesis 1925
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- Roegholt, M.J.W. (author) doctoral thesis 1925
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- Wessel, W. (author) doctoral thesis 1924