Second transisthmian canal. Hearings before the Committee on Commerce, United States Senate, Eighty eighth Congress, second session, on S. 2428, a bill to authorize a study of means of increasing the capacity and security of the Panama Canal, and for other purposes; and S. 2497, a bill to provide for an investigation and study to determine a site for the construction of a sea level interoceanic canal through the American Isthmus. March 3 and 4, 1964.

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