Barra Pony. Image source: The University of St Andrews, “Barra pony with peat panniers.,” 1925. Accessed via https://collections.st-andrews.ac.uk/item/barra-pony-with-peat-panniers/4533.
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.
Richardson, C. (1911). The New Book of the Horse (Vol. 1). London, UK: Cassell and Co Limited.