@book{BergerBergerKellner, author = {Berger, Peter L. and Berger, B. and Kellner, H.}, title = {The Homeless Mind. Modernization and Consciouness. Harmondsworth (Penguin) 1973.}, language = {en} } @book{Berger, author = {Berger, Peter L.}, title = {Invitation to Sociology. A Humanistic Perspective. Harmondsworth (Penguin) 1963.}, language = {en} }