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.(97)

tufts university.(75)

university of manitoba (canada).(70)

university of washington.(65)

university of calgary (canada).(62)

university of california los angeles.(59)

texas a&m university.(56)

university of southern california.(56)

rutgers the state university of new jersey - new brunswick.(55)

university of pennsylvania.(54)

university of guelph (canada).(52)

university of michigan.(47)

dalhousie university (canada).(46)

university of waterloo (canada).(45)

harvard university.(43)

arizona state university.(40)

university of delaware.(37)

university of illinois at urbana-champaign.(36)

columbia university.(35)

clemson university.(32)

michigan state university.(32)

state university of new york at buffalo.(32)

university of maryland college park.(31)

university of illinois at chicago.(30)

portland state university.(29)

the university of texas at arlington.(27)

the university of north carolina at chapel hill.(25)

university of california davis.(23)

university of california irvine.(23)

simon fraser university (canada).(22)