Meinhardt, P. (1950). Inventions, Patients and monopoly (2nd ed.).
Dyfyniad Arddull ChicagoMeinhardt, Peter. Inventions, Patients and Monopoly. 2nd ed. 1950.
Dyfyniad MLAMeinhardt, Peter. Inventions, Patients and Monopoly. 2nd ed. 1950.
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