Cavendish. (1885). Whist developments: American leads and the plain-suit echo. T. De La Rue & Co..
Lua i Stíl Chicago (17ú heag.)Cavendish. Whist Developments: American Leads and the Plain-suit Echo. London: T. De La Rue & Co., 1885.
Lua MLA (8ú heag.)Cavendish. Whist Developments: American Leads and the Plain-suit Echo. T. De La Rue & Co., 1885.
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