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- Van der Maas, H.J. (author) doctoral thesis 1929
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- Klinkenberg, A. (author) doctoral thesis 1929
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- Westerveld, J. (author) doctoral thesis 1929
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- Uytenbogaart, J.W.H. (author) doctoral thesis 1929
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- Wilhelm, C.H.J. (author) doctoral thesis 1928
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- Scheffer, M.A. (author) doctoral thesis 1928
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- Van Niel, C.B. (author) doctoral thesis 1928
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- Van der Steur, J.P.K. (author) doctoral thesis 1928
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- Sloep, A.C. (author) doctoral thesis 1928
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- De Wild, A.M. (author) doctoral thesis 1928
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- Pieters, H.A.J. (author) doctoral thesis 1928
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- Borkent, R.H. (author) doctoral thesis 1928
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- Struyk, A.P. (author) doctoral thesis 1928
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- Mekel, J.A.A. (author) doctoral thesis 1928
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- De Jong, W. (author) doctoral thesis 1928
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- Maan, C.J. (author) doctoral thesis 1928
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- Dingemans, P. (author) doctoral thesis 1928
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- De Ven, L.J. (author) doctoral thesis 1928
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- Van Doorninck, N.H. (author) doctoral thesis 1928
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- Bertram, S.H. (author) doctoral thesis 1928