中国科学技术信息研究所--国家工程技术数字图书馆

capella university.(6)

walden university.(5)

northcentral university.(4)

royal roads university (canada).(4)

the university of wisconsin - madison.(4)

university of southern california.(4)

columbia university.(3)

harvard university.(3)

michigan state university.(3)

northwestern university.(3)

southern illinois university at carbondale.(3)

syracuse university.(3)

the chinese university of hong kong (hong kong).(3)

university of california santa barbara.(3)

university of colorado at boulder.(3)

university of washington.(3)

yale university.(3)

duke university.(2)

eastern university.(2)

george mason university.(2)

georgia institute of technology.(2)

hong kong university of science and technology (hong kong).(2)

mcgill university (canada)(2)

mcgill university (canada).(2)

northern illinois university.(2)

purdue university.(2)

rutgers the state university of new jersey school of graduate studies.(2)

san diego state university(2)

the george washington university.(2)

the university of arizona.(2)