Actions for Compulsory licensing of patents : hearings before the Committee on Patents, Subcommittee on Compulsory Licensing, House of Representatives, Seventy-fifth Congress, third session on H.R. 9259, H.R. 9815, H.R. 1666, March 21, 22, 23, 24, 25, 28, 29, 30, and 31, 1938
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