题目：Sources, Appropriability, and Directions of Technological Change: The Cases of the United States and Italy

• 【作 者】Heimler,Alberto;Malerba,Franco;Peretto,Pietro
• 【刊 名】Banca Nazionale del Lavoro Quarterly Review
• 【出版日期】1993
• 【期 号】No.185
• 【页 码】225-242
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