中国科学技术信息研究所--国家工程技术数字图书馆

university of toronto (canada).(111)

university of london university college london (united kingdom).(99)

long island university the brooklyn center.(72)

the university of north carolina at chapel hill.(64)

university of minnesota.(63)

the university of mississippi.(62)

karolinska institutet (sweden).(60)

purdue university.(55)

university of washington.(55)

university of michigan.(51)

university of kansas.(49)

the university of wisconsin - madison.(46)

university of california san francisco.(45)

the ohio state university.(39)

the university of arizona.(39)

university of maryland baltimore.(39)

state university of new york at buffalo.(37)

university of rhode island.(36)

university of petra (jordan).(35)

the university of iowa.(34)

university of the pacific.(32)

wayne state university.(32)

northeastern university.(31)

university of louisiana at monroe.(30)

walden university.(30)

university of pittsburgh.(29)

university of cincinnati.(27)

university of missouri - kansas city.(27)

west virginia university.(26)

north dakota state university.(24)