中国科学技术信息研究所--国家工程技术数字图书馆

university of california los angeles.(21)

indiana university.(19)

the university of arizona.(19)

university of washington.(18)

arizona state university.(15)

university of maryland college park.(14)

harvard university.(13)

university of california los angeles(13)

university of illinois at urbana-champaign.(12)

university of south florida.(12)

university of hawai'i at manoa.(11)

university of oregon.(11)

arkansas state university.(10)

georgetown university.(10)

rutgers the state university of new jersey - new brunswick.(10)

the university of north carolina at chapel hill.(10)

university of toronto (canada).(10)

clemson university.(9)

michigan state university.(9)

temple university.(9)

the university of texas at austin.(9)

university of pennsylvania.(9)

state university of new york at buffalo.(8)

university of minnesota.(8)

new york university.(7)

purdue university.(7)

rochester institute of technology.(7)

the university of wisconsin - madison.(7)

university of california berkeley.(7)

university of california santa barbara.(7)