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Roca-FernándezA.I., FerrisC.P. and González-RodríguezA. 2013. Short communication. Behavioural activities of two dairy cow genotypes (Holstein-Friesian vs. Jersey x Holstein-Friesian) in two milk production systems (grazing vs. confinement). Spanish Journal of Agricultural Research. 11, 1 (Feb. 2013), 120-126. DOI:https://doi.org/10.5424/sjar/2013111-2682.