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.(22)

university of california los angeles.(19)

mills college.(16)

university of california san diego.(13)

city university of new york.(12)

columbia university.(12)

princeton university.(11)

the florida state university.(11)

the university of iowa.(11)

university of missouri - kansas city.(10)

the university of wisconsin - madison.(9)

the university of north carolina at greensboro.(8)

university of oregon.(8)

university of washington.(8)

ball state university.(7)

boston university.(7)

university of cincinnati.(7)

university of hartford.(7)

new york university.(6)

the university of arizona.(6)

university of kansas.(6)

university of maryland college park.(6)

duke university.(5)

state university of new york at buffalo.(5)

the university of nebraska - lincoln.(5)

university of georgia.(5)

university of south carolina.(5)

university of toronto (canada).(5)

cornell university.(4)

rutgers the state university of new jersey school of graduate studies.(4)