Siskind, C. S. (1952). Direct current machinery. McGraw-Hill.
Chicago-čujuhus (17. p.)Siskind, Charles Seymour. Direct Current Machinery. Nueva York: McGraw-Hill, 1952.
MLA-čujuhus (9. p.)Siskind, Charles Seymour. Direct Current Machinery. McGraw-Hill, 1952.
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