Alternatieve huisvesting leghennen : verslag derde ronde+ eindverslag = Alternative housing systems for laying hens : report third trial and final report
Alternatieve huisvesting leghennen : verslag derde ronde+ eindverslag = Alternative housing systems for laying hens : report third trial and final report / Th.G.C.M. van Niekerk, B.F.J. Reuvekamp