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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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journal article 1925
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Perring, W.G.A. (author) conference paper 1925
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journal article 1925
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Havelock, Th.H. (author) book 1925
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Havelock, Th.H. (author) book 1925
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Havelock, Th.H. (author) book 1925