The specificity of environmental influence: Socioeconomic status affects early vocabulary development via maternal speech. Hoff E. E Hoff - Child development, 2003 - Wiley Online Library GSID: tZzrShmOmzQJ
The environment of childhood poverty. Evans GW. GW Evans - American psychologist, 2004 - psycnet.apa.org GSID: FMWGSb5jLUcJ