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1.
Patents, invention and economic change: data and selected essays by
Language: English
Publication details: Harvard University Press Cambridge 1972
Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1).

2.
Invention and economic growth by
Language: English
Publication details: Harvard University Press Cambridge 1966
Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1).

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