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	1.	The economics of invention and innovation : with a case study of the development of the hovercraft / P. S. Johnson by Johnson, P. S Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: London : M. Robertson, 1975 Availability: Items available for loan: National Library of India (1)Call number: E 338.9 J 636. Place hold Request article Save to lists
	2.	Co-operative research in industry : an economic study / P. S. Johnson by Johnson, P. S Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: London : Martin Robertson, c1973 Availability: Items available for loan: National Library of India (1)Call number: E 338.47072042 J 636. Place hold Request article Save to lists

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