Não informado. (1928). Public Utilities Fortnightly. Public Utilities Reports.
Lua i Stíl Chicago (17ú heag.)Não informado. Public Utilities Fortnightly. Arlington, Va: Public Utilities Reports, 1928.
Lua MLA (8ú heag.)Não informado. Public Utilities Fortnightly. Public Utilities Reports, 1928.
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