中国科学技术信息研究所--国家工程技术数字图书馆

the university of chicago.(11)

university of california los angeles.(10)

university of pennsylvania.(10)

stanford university.(8)

the university of arizona.(8)

duke university.(7)

northcentral university.(7)

northwestern university.(7)

university of california berkeley.(7)

university of illinois at urbana-champaign.(7)

university of rochester.(7)

arizona state university.(6)

columbia university.(6)

university of south carolina.(6)

university of washington.(6)

rutgers the state university of new jersey - newark.(5)

walden university.(5)

city university of new york.(4)

georgetown university.(4)

harvard university.(4)

kwara state university (nigeria).(4)

new york university graduate school of business administration.(4)

nova southeastern university.(4)

the university of alabama.(4)

the university of north carolina at charlotte.(4)

the university of wisconsin - milwaukee.(4)

university of north texas.(4)

university of toronto (canada).(4)

kent state university.(3)

oklahoma state university.(3)