中国科学技术信息研究所--国家工程技术数字图书馆

yale university.(19)

the university of wisconsin - madison.(13)

the johns hopkins university.(12)

university of california berkeley.(9)

wayne state university.(9)

columbia university.(8)

the chinese university of hong kong (hong kong).(8)

the university of north carolina at chapel hill.(8)

harvard university.(7)

stanford university.(7)

state university of new york at stony brook.(7)

university of california san diego.(7)

washington university in st. louis.(7)

state university of new york at buffalo.(6)

university of california san diego(6)

university of houston.(6)

yale university(6)

harvard university(5)

north carolina state university.(5)

the university of texas at austin.(5)

university of california berkeley(5)

university of california los angeles.(5)

university of california san francisco(5)

university of maryland baltimore county.(5)

boston college.(4)

boston university.(4)

colorado state university.(4)

east tennessee state university.(4)

georgia institute of technology.(4)

indiana university.(4)