中国科学技术信息研究所--国家工程技术数字图书馆

walden university.(199)

capella university.(163)

indiana university.(92)

university of california los angeles.(87)

university of toronto (canada).(87)

university of minnesota.(81)

the university of north carolina at chapel hill.(72)

university of michigan.(69)

michigan state university.(68)

arizona state university.(65)

harvard university.(65)

northcentral university.(65)

city university of new york.(64)

the university of arizona.(61)

university of southern california.(61)

the chicago school of professional psychology.(59)

temple university.(55)

the university of wisconsin - madison.(55)

boston university.(53)

new york university.(51)

rutgers the state university of new jersey - new brunswick.(51)

columbia university.(50)

the pennsylvania state university.(50)

university of washington.(50)

indiana university of pennsylvania.(48)

university of california berkeley.(47)

university of illinois at urbana-champaign.(47)

alliant international university.(46)

purdue university.(46)

the university of iowa.(46)