TY - JOUR AU - Fenson, L; Dale, P S; Reznick, J S TI - Variability in Early Communicative Development JO - Monogr Soc Res Child Dev VL - 59 PY - 1994 L3 - PubMed-ID: 7845413 SP - 1 EP - 173 N1 - discussion 174–185 ER -