@book{Bion, author = {Bion, W. R.}, title = {Experiences in Groups, and Other Papers. London (Tavistock) 1961.}, language = {en} } @book{Beckett, author = {Beckett, S.}, title = {Poems in english, New York (Grove Press) 1961.}, language = {en} } @book{Beckett, author = {Beckett, S.}, title = {Happy days, New York (Grove Press) 1961.}, language = {en} } @book{Avila, author = {Avila, Theresia von}, title = {Interior Castle, Garden City/New York (Doubleday Image Books) 1961.}, language = {en} } @book{Ardrey, author = {Ardrey, R.}, title = {African Genesis, New York, London (Atheneum) 1961.}, language = {en} } @book{OPUS4-16277, title = {Essential works of Marxism, New York (Bantam Books) 1961.}, editor = {Mendel, A. P.}, language = {en} }