This image was donated by Pearson Scott Foresman, an educational publisher, to Wikimedia Commons, and is thereby in the Public Domain. --- See http://commons.wikimedia.org/wiki/Category:Pearson_Scott_Foresman_publisher
荷斯坦奶牛
animal、biology、bovine、cattle、cow、externalsource、farm、line art、mammal、outline、psf、Violin、wikimedia commons、zoology
動物、生物學、牛、黃牛、牛、外部源、農場、線條藝術、哺乳動物、大綱、PSF、小提琴、維基媒體公地、動物學
資料來源：openclipart ( https://openclipart.org/ )