00441nam a22001337a 4500020002100000020002400021082001600045100001900061245002500080260003900105300003400144500002000178650010900198  a1597562637 (pbk)  a9781597562638 (pbk)  a401.93bGER  aGerken, Louann  aLanguage development  aSan DiegobPlural Publishingc2009  axiii, 245 p.b: ill.c; 23cm.  aIncludes index.  aLanguage acquisitionaLinguistic productionvLanguage developmentvTheoriesvFeaturesvIssuesvSLPvRCRS