Lerner, J. (1999). 150 years of patent office practice. National Bureau of Economic Research.
Chicago-viite (17. p.)Lerner, Josh. 150 Years of Patent Office Practice. Cambridge: National Bureau of Economic Research, 1999.
MLA-viite (9. p.)Lerner, Josh. 150 Years of Patent Office Practice. National Bureau of Economic Research, 1999.
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