中国科学技术信息研究所--国家工程技术数字图书馆

georgetown university.(4)

fordham university.(3)

michigan state university.(3)

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

university of california berkeley.(3)

university of illinois at urbana-champaign.(3)

cornell university.(2)

duke university.(2)

harvard university.(2)

state university of new york at buffalo.(2)

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

the university of chicago.(2)

university of california irvine(2)

university of california los angeles.(2)

university of california san diego.(2)

university of california santa barbara.(2)

university of massachusetts amherst.(2)

university of michigan(2)

university of minnesota.(2)

university of southern california.(2)

university of washington.(2)

boston college.(1)

brown university.(1)

carnegie mellon university.(1)

chicago state university.(1)

city university of new york.(1)

clark university.(1)

columbia university.(1)

duquesne university(1)

harvard university(1)