1963=142,3593; 1964=146,3647,A; 1965=150,3699,A; 1966=154,3751,A; 1968/69=162,3856,A; 1969/70=165,3900,A; 1970/71=169,3951,A; 1971/72=174,4010,A; 1972/73=178,4063,A; 1973/74=182,4114,A; 1974=186,4165,A; 1975=190,4216,A; 1976=194,4267,A; 1977=197,4309,A von: Science (ISSN: 0036-8075)