Gernal knowledge

Junior Pears Ecyclopaedia Author not listed 1964 Pears cyclopaedia 1953-1954 Author not listed 1954 Pears cyclopaedia 1961-62 Author not listed 1961 Pears cyclopaedia 1966-67 Author not listed 1966 Pears cyclopaedia 1988-89 Cook،Christopher 1986 Test Your Intelligence Author not listed 1990