Berle, A. K., & Camp, L. S. d. (1959). Inventions, patents, and their management. D. Van nostrand company.
Chicago Edition CitationBerle, Alf K., i L. Sprague de Camp. Inventions, Patents, and Their Management. London: D. Van nostrand company, 1959.
Cita MLABerle, Alf K., i L. Sprague de Camp. Inventions, Patents, and Their Management. D. Van nostrand company, 1959.
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