Review: The Sociolinguistics of Language. Introduction to Sociolinguistics, Volume II - de Matos, Francisco Gomes (Discourse & Society, 1991)
https://katalog.adlr.link/Record/ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS80Mjg4ODc0MA