TY - JOUR A1 - Cumming, E. A1 - Schneider, D.M. T1 - Sibling Solidarity: A Property of American Kinship1 Y1 - 1961 DO - 10.1525/aa.1961.63.3.02a00030 JF - American Anthropologist VL - 63 IS - 3 SP - 498 EP - -507 ER -