TY - JOUR A1 - Charmantier, A. A1 - Keyser, A.J. A1 - Promislow, D.E.L. T1 - First evidence for heritable variation in cooperative breeding behaviour Y1 - 2007 DO - 10.1098/rspb.2007.0012 JF - Proceedings of the Royal Society B: Biological Sciences VL - 274 IS - 1619 ER -