中国科学技术信息研究所--国家工程技术数字图书馆

the university of wisconsin - madison.(4)

utah state university.(4)

harvard university(3)

university of california san francisco.(3)

the university of arizona.(2)

university of california riverside.(2)

university of illinois at urbana-champaign.(2)

arizona state university.(1)

auburn university.(1)

city university of new york.(1)

clemson university.(1)

dartmouth college.(1)

drexel university.(1)

duke university(1)

eastern michigan university.(1)

ecole de technologie superieure (canada).(1)

emory university(1)

georgetown university.(1)

illinois state university.(1)

iowa state university.(1)

long island university the brooklyn center.(1)

michigan state university.(1)

north carolina state university(1)

north dakota state university.(1)

northern arizona university.(1)

oklahoma state university.(1)

open university (united kingdom).(1)

san diego state university.(1)

southeast missouri state university.(1)

state university of new york college of environmental science and forestry(1)