Heckendorn, Felix; Häring, Dieter Adrian; Maurer, Veronika; Zinsstag, Jakob; Langhans, Wolfgang and Hertzberg, Hubertus (2006) Effect of sainfoin (Onobrychis viciifolia) silage and hay against gastrointestinal nematodes in lambs. Veterinary Parasitology, 142 (Issues 3-4), pp. 293-300. [ In Press , 2006]