中国科学技术信息研究所--国家工程技术数字图书馆

georgetown university.(6)

university of california los angeles.(6)

walden university.(6)

the florida state university.(5)

university of minnesota.(5)

capella university.(4)

the claremont graduate university.(4)

the university of north carolina at chapel hill.(4)

the university of wisconsin - madison.(4)

university of california berkeley.(4)

alliant international university.(3)

boston college.(3)

brown university.(3)

city university of new york.(3)

harvard university.(3)

new york university.(3)

northcentral university.(3)

purdue university.(3)

state university of new york at buffalo.(3)

texas a&m university.(3)

university of phoenix.(3)

drew university.(2)

florida international university.(2)

indiana university.(2)

michigan technological university.(2)

new mexico state university.(2)

north carolina agricultural and technical state university.(2)

oklahoma state university.(2)

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

the university of chicago.(2)