Webb, H. L. (1891). A practical guide to the testing of insulated wires and cables. D. Van Nostrand company.
Lua i Stíl Chicago (17ú heag.)Webb, Herbert Laws. A Practical Guide to the Testing of Insulated Wires and Cables. New York: D. Van Nostrand company, 1891.
Lua MLA (8ú heag.)Webb, Herbert Laws. A Practical Guide to the Testing of Insulated Wires and Cables. D. Van Nostrand company, 1891.
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