Pigs : an international journal on pig keeping

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1. 1996

   • Vol. 12: Europe - a level playing field?

     p. 38

     Meijden, Chris van der; Hesse, Dirk
2. 1995

   • Vol. 11: The sloped floor system - an accomodating pen design

     p. 29

     Hesse, Dirk; Jackisch, Thomas