中国科学技术信息研究所--国家工程技术数字图书馆

columbia university.(30)

harvard university.(25)

university of california berkeley.(21)

the university of north carolina at chapel hill.(20)

university of washington.(19)

stanford university.(18)

yale university.(18)

georgetown university.(17)

university of california los angeles.(17)

the university of wisconsin - madison.(16)

university of minnesota.(16)

duke university.(14)

the university of chicago.(14)

university of pennsylvania.(14)

university of toronto (canada).(14)

northwestern university.(13)

the ohio state university.(13)

university of california san diego.(13)

princeton university.(12)

temple university.(12)

walden university.(12)

the pennsylvania state university.(11)

university of michigan.(11)

university of southern california.(11)

adler school of professional psychology.(10)

city university of new york.(10)

indiana university.(10)

michigan state university.(10)

southern illinois university at carbondale.(10)

the chinese university of hong kong (hong kong).(10)