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1.

図書
図書
1. Patterns of technological innovation
Devendra Sahal ; foreword by Richard R. Nelson
出版情報: Reading, Mass. : Addison-Wesley Pub. Co., Advanced Book Program/World Science Division, 1981
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2.

図書
図書
2. Technological substitution : forecasting techniques and applications
edited by Harold A. Linstone, Devendra Sahal
出版情報: New York : Elsevier Pub. Co., c1976
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