中国科学技术信息研究所--国家工程技术数字图书馆

the university of nebraska - lincoln(35)

columbia university(32)

university of michigan(31)

university of toronto (canada)(30)

university of virginia(29)

the university of chicago(27)

indiana university(26)

state university of new york at buffalo(25)

university of california berkeley(25)

yale university(25)

new york university(24)

city university of new york(22)

university of illinois at urbana-champaign(22)

the university of wisconsin - madison(20)

florida atlantic university(18)

princeton university(18)

rutgers the state university of new jersey - new brunswick(18)

michigan state university(17)

emory university(16)

texas a&m university(16)

university of alberta (canada)(16)

university of california davis(16)

university of southern california(16)

duke university(15)

northwestern university(15)

state university of new york at binghamton(15)

the university of north carolina at chapel hill(15)

university of california los angeles(15)

university of oregon(15)

georgetown university(14)