Helen Owoya Abah surveillance for newcastle disease virus and antibodies and assessment of biosecurity in poultry farms and live bird market in benue state, nigeria / by Helen Owoya Abah - Nigeria : Dept veterinary medicine of ABU, 2015 - xxi,196 leaves : ills. Includes bibiliographical reference Subjects--Topical Terms: Medicines. LC Class. No.: SF 995.6.N4