中国科学技术信息研究所--国家工程技术数字图书馆

university of toronto (canada).(8)

arizona state university.(7)

portland state university.(5)

state university of new york college of environmental science and forestry.(5)

university of southern california.(5)

drexel university.(4)

temple university.(4)

university of colorado at denver.(4)

university of maryland college park.(4)

villanova university.(4)

southern illinois university at carbondale.(3)

southern university and agricultural and mechanical college.(3)

the ohio state university.(3)

tufts university.(3)

university of massachusetts amherst.(3)

university of oregon.(3)

clemson university.(2)

colorado school of mines.(2)

marquette university.(2)

michigan state university(2)

michigan state university.(2)

pontificia universidad catolica de chile (chile).(2)

pratt institute.(2)

purdue university.(2)

rutgers the state university of new jersey school of graduate studies.(2)

state university of new york at buffalo.(2)

the university of arizona.(2)

university of denver.(2)

university of maryland college park(2)

university of pennsylvania.(2)