RT Article T1 The stability and reliability of expected family size data JF Milbank Memorial Fund quarterly bulletin VO 37 IS 4 SP 369 OP 385 A1 Goldberg, David A1 Freedman, Ronald A1 Sharp, Harry A2 Freedman, Ronald A2 Sharp, Harry LA English YR 1959 UL https://krimdok.uni-tuebingen.de/Record/191271020X