(en) Amy Hazel, Brad Heins et Les Hansen, « ProCROSS crossbreds were more profitable than their Holstein herdmates
in a 10-year study with high-performance Minnesota dairy herds », University of Minnesota, , p. 1-27 (lire en ligne [archive du ] [PDF])
web.archive.org
(en) Amy Hazel, Brad Heins et Les Hansen, « ProCROSS crossbreds were more profitable than their Holstein herdmates
in a 10-year study with high-performance Minnesota dairy herds », University of Minnesota, , p. 1-27 (lire en ligne [archive du ] [PDF])