Newcastle Disease formatIsbn:Softcover 9781461289876 but are they effective FACR but are they effective This book constitutes the thoroughly refereed post proceedings of the 4th International Workshop on Automated Deduction in Geometry The economic importance of Newcastle disease virus and its use as a laboratory model has meant that major advances have been quickly applied to the field situation whenever possible and Newcastle disease poses a considerable threat to their well being and profitability and it is not unreasonable to state that hardly a single commercial flock of poultry is raised in the world without Newcastle disease having some effect due to actual disease