Rodríguez-Bermúdez, Ruth, Marta Miranda, Inmaculada Orjales, Francisco Rey-Crespo, Nieves Muñoz, and Marta López-Alonso. “Holstein-Friesian Milk Performance in Organic Farming in North Spain: Comparison With Other Systems and Breeds”. Spanish Journal of Agricultural Research 15, no. 1 (April 20, 2017): e0601. Accessed April 28, 2024. https://sjar.revistas.csic.es/index.php/sjar/article/view/10037.