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Kuenen, J.G. (author), Veldkamp, H. (author)
journal article 1972
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Kuenen, J.G. (author), Veldkamp, H. (author)
journal article 1970
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Kuenen, J.G. (author), Boonstra, J. (author), Schroeder, H.G.J. (author), Veldkamp, H. (author)
journal article 1977
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Kuenen, J.G. (author), Veldkamp, H. (author)
journal article 1971
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Kuenen, J.G. (author), Veldkamp, H. (author)
journal article 1973
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