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2. So far, no more Delaware farms test positive;Goldblatt;News Journal (Wilmington, DE),2004
3. Investigation of two H7N2 avian influenza outbreaks in two broiler breeder flocks in Pennsylvania, 2001–02;Lu;Avian Dis.,2004
4. Avian influenza: Recent developments;Capua;Avian Pathol.,2004
5. Bird flu in Texas a threat;Montgomery;News Journal (Wilmington, DE),2004