Norfolk Red. Image source: Suffolk Punch Heavy Horse Museum, “Prize Heifer, 2 Years and 8 Months,” 1840. Accessed via https://artuk.org/discover/artworks/prize-heifer-2-years-and-8-months-10534/search/2025--terms:heifer/page/1/view_as/grid.
Porter, V., & Mason, I. L. (2002). Mason’s World Dictionary of Livestock Breeds, Types and Varieties (5th ed.). Wallingford, Oxfordshire, UK: CABI Publishing.
Porter, V., Alderson, L., Hall, S. J. G., & Sponenberg, D. P. (2016). Mason’s World Encyclopedia of Livestock Breeds and Breeding: 2 Volume Pack (1st ed.). Wallingford, Oxfordshire, UK: CABI.