TY - CHAP A1 - Pollard, M.S. A1 - Harris, K.M. T1 - Measuring cohabitation in add health Y1 - 2007 A3 - Hofferth, S.L. A3 - Casper, L.M. T2 - Handbook of measurement issues in family research CY - Mahwah, NJ PB - Lawrence Erlbaum Associates SP - 35 EP - -51 ER -