Vol. 16 No. 4 (1989)

Articles

• Comparative placentation in laboratory animals A review

  N. Björkman, V. Dantzer, R. Leiser

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• Animal house costs and management

  Rodger G. Dalton

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• Technical note Communication: Frequency ofchanging solid-walled cages does not affect pentobarbitone-induced sleeping time in rats and mice

  A. C. P. Wizkam', G. Van Tintelen, A. C. Beynen

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