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Educational research in Japan - 1972
Levien, Roger E. - 1973
Persistent link: https://www.econbiz.de/10002303426
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Mathematical modelling at IIASA
Levien, Roger E. (contributor) - 1983 - Reprint
Persistent link: https://www.econbiz.de/10000716800
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R&D management : methods used by federal agencies
Wirt, John G.; Lieberman, Arnold J.; Levien, Roger E. - 1974
Persistent link: https://www.econbiz.de/10002303807
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Taking technology to market : six stages to success
Levien, Roger Eli - 1997
Persistent link: https://www.econbiz.de/10004362664