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by Liedtke, Walter; Plomp, Michiel C.; Ruger, Axel; et al.
by Walter Liedtke
by Walter Liedtke et al.
by Liedtke, Walter
by Borenius, Tancred; Liedtke, Walter
by Liedtke, Walter A.; Plomp, Michiel; Ruger, Axel; et al.