Frequencies of genes for coat colour and horns in Nordic cattle breeds Juha Kantanen, Ingrid Olsaker, Klaus Brusgaard, Emma Eythorsdottir, Lars-Erik Holm, Sigbjørn Lien, Birgitta Danell and Stefan Adalsteinsson Genet. Sel. Evol., 32 6 (2000) 561-576 DOI: 10.1051/gse:2000137