Dalzell, F. (2009). Engineering invention: Frank J. Sprague and the U.S. electrical industry. MIT Press.
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Chicago-čujuhus (17. p.)
Dalzell, Frederick. Engineering Invention: Frank J. Sprague and the U.S. Electrical Industry. Cambridge, MA: MIT Press, 2009.
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MLA-čujuhus (9. p.)
Dalzell, Frederick. Engineering Invention: Frank J. Sprague and the U.S. Electrical Industry. MIT Press, 2009.
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