中国科学技术信息研究所--国家工程技术数字图书馆

university of washington.(195)

university of california berkeley.(154)

harvard university.(136)

arizona state university.(133)

university of california los angeles.(133)

university of toronto (canada).(128)

temple university.(111)

university of maryland college park.(105)

university of southern california.(94)

university of pennsylvania.(82)

state university of new york at buffalo.(81)

michigan state university.(80)

university of michigan.(76)

university of minnesota.(71)

city university of new york.(69)

columbia university.(66)

the university of wisconsin - madison.(66)

the university of chicago.(64)

university of california irvine.(62)

university of cincinnati.(62)

new york university.(59)

rutgers the state university of new jersey - new brunswick.(58)

the ohio state university.(54)

walden university.(53)

university of illinois at chicago.(51)

texas a&m university.(49)

the chinese university of hong kong (hong kong).(49)

the university of arizona.(48)

university of delaware.(48)

princeton university.(47)