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Bauer, R.A. (author), Kruis, F.E. (author), Becht, J.G.M. (author), Scarlett, B. (author), Schoonman, J. (author)
journal article 1989
document
Bauer, R.A. (author), Becht, J.G.M. (author), Kruis, F.E. (author), Scarlett, B. (author), Schoonman, J. (author)
journal article 1991