 world biomed journal 1951-60 a studi rel signific 1 388 titl index current list medic literatur thi studi applic relationship serial articl publish serial articl cite develop theori author's statist bibliographi health scienc bulletin 50 450-461 juli 1962 a rank list index signific serial index current list medic literatur deriv erect 21 000 citat secur random sampl 1962 1961 biomed journal regularli receiv yale medic librari the author measur gross index effect current list index signific offer method reach object standard index abstract project measur gener serial analyz 