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by Koopman, Ken
by Harvey, Andrew; Koopman, Siem Jan; Shephard, Neil
by Sportiche, Dominique; Koopman, Hilda; Stabler, Edward
by Durbin, James; Koopman, Siem Jan
by Horvath, Zoltan; Zsok, Viktoria; Achten, Peter; et al.
by Koopman, Marnix
by Koopman, Karl F.
by McCarty, Daniel J.; Koopman, William J.
by Oscar Koopman; Karen J. Koopman