Animal Agriculture Research Progress
http://www.amazon.co.uk/Animal-Agriculture-Research-Progress-Tolenhoff/dp/1604560584/ref=sr_1_sc_1?s=books&ie=UTF8&qid=1340012280&sr=1-1-spell
Current Veterinary Therapy: Food Animal Practice
http://www.amazon.co.uk/Current-Veterinary-Therapy-Animal-Practice/dp/1416035915/ref=sr_1_3?s=books&ie=UTF8&qid=1340012450&sr=1-3
Livestock Economics
http://www.amazon.co.uk/Livestock-Economics-Archana-Ruhela/dp/9380179227/ref=sr_1_6?s=books&ie=UTF8&qid=1340012530&sr=1-6