Britannica :Book of the Year
. - Chicago : Encyclopaedia Britannica , 1971-86
. - p.; 28 cm.
1972: Events of 1971. 800 pp. 1971: Events of 1970. 832+64 pp. 1973: Events of 1972. 800 pp. 1974: Events of 1973. 800 pp. 1975: Events of 1974. 768 pp. 1976: Events of 1975. 767 pp. 1977: Events of 1976. 768 pp. 1978: Events of 1977. 768 pp. 1979: Events of 1978. 768 pp. Ref. 59303 1980: Events of 1979. 766 pp. 1981: Events of 1980. 766 pp. 1982: Events of 1981. 766 pp. 1983: Events of 1982. 766 pp. 1984: Events of 1983. 766 pp. 1985: Events of 1984. 990 pp. 1986: Events of 1985. 990 pp.
Enciclopedia Británica
1972: Events of 1971. 800 pp. 1971: Events of 1970. 832+64 pp. 1973: Events of 1972. 800 pp. 1974: Events of 1973. 800 pp. 1975: Events of 1974. 768 pp. 1976: Events of 1975. 767 pp. 1977: Events of 1976. 768 pp. 1978: Events of 1977. 768 pp. 1979: Events of 1978. 768 pp. Ref. 59303 1980: Events of 1979. 766 pp. 1981: Events of 1980. 766 pp. 1982: Events of 1981. 766 pp. 1983: Events of 1982. 766 pp. 1984: Events of 1983. 766 pp. 1985: Events of 1984. 990 pp. 1986: Events of 1985. 990 pp.
Enciclopedia Británica