1918, Massachusetts Agricultural Experiment Station, Annual Report, №s 30–39, page #102:Non-broodiness, therefore, is a comprehensive term employed to describe the phænotypic condition resulting from several sorts of genetic differences.
1937, Among these Zulu Zebras there are some phænotypicburchelli with totally unstriped limbs, but the majority is of the narrow and somewhat irregularly banded wahlbergi-type with at least a few stripes on the knees and hocks.
