About middle class theory: history and modern times
Kovrigin Boris Vasilevich,
Sinitsyna Tatyana Ivanovna
Population welfare in the studies of the Vologda research center of the Russian Academy of Sciences
Leonidova Galina V.,
Basova Elena A.,
Belekhova Galina V.,
Rossoshanskii Aleksandr I.,
Gruzdeva Maria A.