Karyotypes of four species of birds of the families Ploceidae and Paridae. J. Hered. 60: 134–136. Google Scholar Chromosome Atlas: Fish, amphibians, reptiles and birds. Vol. 1, 1971. M. L. Beçak, W. Beçak, F. L. Roberts, R. N. Shoffner & E. P. Volpe (eds). ...