中国科学技术信息研究所--国家工程技术数字图书馆

indiana university.(10)

northwestern university.(8)

university of washington.(6)

city university of new york.(5)

harvard university.(5)

columbia university.(4)

purdue university.(4)

rutgers the state university of new jersey - new brunswick.(4)

stanford university.(4)

university of california berkeley.(4)

university of cincinnati.(4)

university of toronto (canada).(4)

northeastern university.(3)

rutgers the state university of new jersey - new brunswick(3)

saint louis university.(3)

the ohio state university.(3)

the pennsylvania state university.(3)

the university of arizona.(3)

the university of wisconsin - madison.(3)

university of california irvine.(3)

university of california merced.(3)

yale university.(3)

clemson university.(2)

duke university.(2)

florida atlantic university.(2)

georgia institute of technology.(2)

lutheran school of theology at chicago.(2)

michigan state university.(2)

north carolina state university.(2)

princeton university(2)