TY - CHAP A1 - Gates, G.J. A1 - Sell, R. T1 - Measuring gay and lesbian couples 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 ER -