00288nam a2200109 a 450000500170000002000150001708200190003210000220005124500530007326000370012630000150016320251203091858.0  a8171880576  a417.7,bD, sam  aSambasiva Rao, G.  aLanguage change : lexical diffusion and literacy  aDelhibAcademic Foundationc1994  a176p, 22cm