00730nam a2200205Ia 450000100060000000300050000600500170001100800410002801000150006905000160008408200110010024501530011126000490026430000220031350400290033565000520036470000420041670000320045870000340049029394BIBL20160527202850.0711007s1967    nyua     b    00000 eng    a 67026164 0 aLC4602b.L3  a371.9200aLanguage and mental retardation, empirical and conceptual considerationscEdited by Richard L. Schiefelbusch, Ross H. Copeland [and] James O. Smith.0 aNew YorkbHolt, Rinehart and Winstonc[1967]  ax, 208 p.billus.  aIncludes bibliographies. 0aMentally handicapped childrenxLanguage.2Local10aSchiefelbusch, Richard L.eed.2Local10aSmith, James O.eed.2Local10aCopeland, Ross H.eed.2Local