中国科学技术信息研究所--国家工程技术数字图书馆

university of california berkeley.(19)

the university of chicago.(10)

city university of new york.(9)

university of california los angeles.(8)

university of michigan.(8)

university of toronto (canada).(8)

university of pennsylvania.(7)

the university of wisconsin - madison.(6)

university of washington.(6)

columbia university.(5)

duke university.(5)

northwestern university.(5)

temple university.(5)

university of california davis.(5)

harvard university.(4)

rutgers the state university of new jersey - new brunswick.(4)

state university of new york at binghamton.(4)

university of california irvine.(4)

american university.(3)

arizona state university.(3)

michigan state university.(3)

the university of north carolina at chapel hill.(3)

city university of new york(2)

new york university.(2)

northeastern university.(2)

princeton university.(2)

simon fraser university (canada).(2)

the chinese university of hong kong (hong kong).(2)

the florida state university.(2)

the johns hopkins university.(2)