中国科学技术信息研究所--国家工程技术数字图书馆

university of alberta (canada).(5)

university of california davis.(4)

university of maryland college park.(4)

university of minnesota(3)

university of minnesota.(3)

university of washington.(3)

duke university.(2)

georgia institute of technology.(2)

illinois institute of technology.(2)

old dominion university.(2)

state university of new york college of environmental science and forestry.(2)

texas a&m university.(2)

the pennsylvania state university.(2)

the university of iowa.(2)

the university of southern mississippi.(2)

the university of wisconsin - madison.(2)

university of california irvine.(2)

university of colorado at boulder.(2)

university of maryland baltimore county.(2)

university of rhode island.(2)

university of toronto (canada).(2)

university of windsor (canada).(2)

west virginia university.(2)

adelphi university.(1)

arizona state university.(1)

arkansas state university.(1)

auburn university.(1)

baylor university(1)

bradley university.(1)

california state university fresno(1)