中国科学技术信息研究所--国家工程技术数字图书馆

indiana university.(5)

the ohio state university.(4)

harvard university.(3)

the university of chicago.(3)

the university of wisconsin - madison.(3)

university of oregon.(3)

arizona state university.(2)

duke university.(2)

george mason university.(2)

harvard university(2)

howard university.(2)

ohio university.(2)

rutgers the state university of new jersey - new brunswick.(2)

the university of iowa(2)

the university of north carolina at chapel hill.(2)

the university of texas at arlington.(2)

university of california berkeley(2)

university of oregon(2)

university of pennsylvania.(2)

university of san francisco.(2)

antioch university.(1)

bangor university (united kingdom).(1)

boston university(1)

boston university.(1)

brandeis university.(1)

brigham young university.(1)

brown university.(1)

california state university fullerton(1)

california state university los angeles.(1)

city university of new york.(1)