1. The Children of Sanchez: Autobiography of a Mexican Family;Lewis,1963
2. The Culture of Poverty
3. The Myth of Marginality;Perlman,1976
4. Six Misconceptions About Squatter Settlements;Perlman;Development,1986
5. Manuel Castells, in Estructura de Classes y Politica Urbana en America Latina, studied the class composition of squatter settlements in Santiago, Chile, in 1968–1969 and found that, despite the prevailing idea of ‘marginality’, squatter settlements were not concentrations of lumpen proletariat, but that 63% of squatters were proletarian workers.