1. The treatment of agricultural wastes;Hobson,1990
2. Treatment of animal wastes and uses of treated residues;Hobson,1992
3. Tratamiento de purines;Olmos,1994
4. An integrative treatment process for piggery wastes based on anaerobic digestion;Kimchie,1988
5. Ambient temperature anaerobic digestion of piggery wastewater;Bortne,1992