Schenck, H. H. (1975). The world's submarine telephone cable systems. U.S. Dept. of Commerce, Office of Telecommunications.
Citace podle Chicago (17th ed.)Schenck, H. H. The World's Submarine Telephone Cable Systems. [Washington]: U.S. Dept. of Commerce, Office of Telecommunications, 1975.
Citace podle MLA (8th ed.)Schenck, H. H. The World's Submarine Telephone Cable Systems. U.S. Dept. of Commerce, Office of Telecommunications, 1975.
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