1. Brazilian market in perspective;Anonymous;Anim. Pharm.,1991
2. A study of bovine parasitic gastro-enteritis in Paraguay;Benitez-Usher;Prev. Vet. Med.,1984
3. Resistance of parasites to antiparasitic drugs,1990
4. Anthelmintic resistance in nematodes of farm animals;Coles,1993
5. Argentinian market for animal health products;Doyle;Anim. Pharm. Suppl.,1992