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).(12)

university of michigan.(8)

georgia institute of technology.(6)

university of illinois at urbana-champaign.(6)

purdue university.(5)

rutgers the state university of new jersey - new brunswick.(5)

the university of texas at arlington.(5)

universite de sherbrooke (canada).(5)

university of illinois at chicago.(5)

university of ottawa (canada).(5)

university of windsor (canada).(5)

lehigh university.(4)

the university of texas at austin.(4)

university of calgary (canada).(4)

university of california berkeley.(4)

hong kong university of science and technology (hong kong).(3)

hong kong university of science and technology (people's republic of china).(3)

mcmaster university (canada).(3)

michigan state university.(3)

north carolina state university.(3)

portland state university.(3)

queen's university at kingston (canada).(3)

the university of alabama in huntsville.(3)

the university of western ontario (canada).(3)

university of california los angeles.(3)

university of kansas.(3)

university of manitoba (canada).(3)

university of waterloo (canada).(3)

wayne state university.(3)

hong kong polytechnic university (hong kong).(2)