TY - JOUR A1 - Gibson, M.A. A1 - Gurmu, E. T1 - Land inheritance establishes sibling competition for marriage and reproduction in rural Ethiopia Y1 - 2011 DO - 10.1073/pnas.1010241108 JF - Proceedings of the National Academy of Sciences VL - 108 IS - 6 SP - 2200 EP - -2204 ER -