"Sociology." . . "Estructura social." . . "Comunitat." . . "Sociologia Teories." . . "Sociologie." . . "Sociologia - Saggi." . . "Sociologia política" . . "Sociología." . . "Sociologia." . "Bibliographie" . . . . . . . . . "On sociology: pure, applied, and empirical.l"@en . . . . "On sociology: pure, applied and empirical" . "Ferdinand Toennies on sociology: pure, applied, and empirical"@en . "Ferdinand Toennies on sociology: pure, applied, and empirical" . "Ferdinand Toennies : on sociology pure, applied and empirical : selected writings" . . "Ferdinand Toennies on Sociology : Pure, Applied and Empirical : selected Writings" . . . . "On sociology: pure, applied, and empirical. Selected writings, edited and with an introduction by Werner J. Cahnman and Rudolf Heberle"@en . "Ferdinand Toennies on sociology: pure, applied and empirical : selected writings [translated from the German]" . . . . . "On sociology: Pure, applied, and empirical : Selected writings. With an introd" . . . . . . . . "On sociology : pure, applied, and empirical"@en . "On sociology : pure, applied, and empirical" . . . . . . "On sociology: pure, applied, amd empirical : selected writings" . . . . "On sociology pure,applied and empirical-selected writings" . . "Ferdinand Toennies on sociology, pure, applied and empirical edited and with an introduction by Werner J. Cahnman and Rudolf Heberle : selected writings (translated from the German)" . "On sociology : pure applied, and empirical : selected writings" . "Ferdinand Toennies on sociology: pure, applied, and empirical" . . "On sociology pure applied, and empirical" . . . . . "On sociology : pure, applied, and empirical ; selected writings" . . . . . . . . . "On sociology : pure, applied, and empirical : selected writings"@en . "On sociology : pure, applied, and empirical : selected writings" . "Ferdinand Toennies on sociology pure, applied, and empirical" . . .