Table 1-6. Scientific literature' in selected fields' as a percent of 

 total literature, by country, 1965-73 



Selected field and year 



Chemistry 



1965 



1967 



1969 



1971 



1972 



1973 



Engineering 



1965 



1967 



1969 



1971 



1972 



1973 



Mathematics 



1965 



1967 



1969 



1971 



1972 



1973 



Molecular biology 



1965 



1967 



1969 



1971 



1972 



1973 



Physics 



1965 



1967 



1969 



1971 



1972 



1973 



Psychology 



1965 



1967 



1969 



1971 



1972 



1973 



Systematic biology 



1967 



1969 



1971 



1972 



1973 



158 



' Includes articles, letters and notes from the sample of 492 scientific journals most heavily cited in 1965. 

 ^ The social sciences are excluded because comparable data are not available 



^ Prior to 1972, data for East Germany were included in the fields of chemistry, engineering, molecular biology, physics, and psychology. 

 * For mathematics and systematic biology, these numbers are the size of the literature samp/e from which the percent distributions were derived, and should 

 not be used as counts of articles 



NOTE: Percents may not add to 100 because of rounding. 



SOURCE Computer Honzons, Inc.. Indicators of the Quantity and Quality of the Scientific Literature. 1975 (A study commissioned specifically for this 

 report). 



