%0 Journal Article %T XX/XY chromosomal chimerism in infertile sheep of the Cambridge breed %A Gill JJB %A Davies DAR %J Genetics Selection Evolution %D 1991 %I BioMed Central %R 10.1186/1297-9686-23-s1-s126 %U http://www.gsejournal.org/content/23/S1/S126