中国科学技术信息研究所--国家工程技术数字图书馆

arizona state university.(8)

university of california berkeley.(8)

university of toronto (canada).(7)

michigan state university.(6)

university of washington.(6)

the university of wisconsin - milwaukee.(5)

city university of new york.(4)

north carolina state university(4)

north carolina state university.(4)

state university of new york at buffalo.(4)

university of california davis.(4)

university of california los angeles.(4)

university of hawai'i at manoa.(4)

harvard university.(3)

royal roads university (canada).(3)

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

the university of north carolina at chapel hill.(3)

the university of wisconsin - madison.(3)

university of california irvine.(3)

university of southern california.(3)

capella university.(2)

columbia university.(2)

cornell university.(2)

illinois institute of technology.(2)

indiana university.(2)

new jersey institute of technology(2)

old dominion university.(2)

pratt institute.(2)

princeton university.(2)

queen's university (canada).(2)