Grewal G S, Singh B
Avian Dis. 1978 Jul-Sep;22(3):519-21.
In 14,891 necropsies performed on domestic poultry during January 1976 to October 1977, two cases of skeletal abnormalities were found. One was a tarsometatarsal spur in an adult female chicken, and the other was a crossed-beak associated with microphthalmia.
在1976年1月至1977年10月期间对家禽进行的14891次尸检中，发现了两例骨骼异常情况。一例是成年雌性鸡的跗跖骨距突，另一例是与小眼症相关的交叉喙。
