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Beyerinck, J.A. (author), Boogaard, J.F. (author), Cappelle, H. (author), Egeling, L.J. (author), Van Hasselt, A.W.M. (author), Jäger, J.G. (author), Levoir, L.C. (author), Staring, W.C.H. (author)
report 1868