Walker, R. C. (1953). Relays for electronic and industrial control. Chapman & Hall.
Lua i Stíl Chicago (17ú heag.)Walker, R. C. Relays for Electronic and Industrial Control. London: Chapman & Hall, 1953.
Lua MLA (9ú heag.)Walker, R. C. Relays for Electronic and Industrial Control. Chapman & Hall, 1953.
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