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- Schoyer, H.F.R. (author), Korting, P.A.O.G. (author), Vos, J.B. (author) report 1982
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- Schoyer, H.F.R. (author), Korting, P.A.O.G. (author), Vos, J.B. (author), Versmissen, J.P.M. (author) report 1983
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- Schoyer, H.F.R. (author), Korting, P.A.O.G. (author), Vos, J.B. (author), Versmissen, J.P.M. (author) report 1984
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- Schoyer, H.F.R. (author), Korting, P.A.O.G. (author), Vos, J.B. (author), Versmissen, J.P.M. (author) report 1983