Matches in Library of Congress for { ?s ?p I. Direct currents.--II. Alternating currents.. }
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- 04001636 description "I. Direct currents.--II. Alternating currents.".
- 27020018 description "I. Direct currents.--II. Alternating currents.".
- 40033900 description "I. Direct currents.--II. Alternating currents.".
- 04001636 tableOfContents "I. Direct currents.--II. Alternating currents.".
- 27020018 tableOfContents "I. Direct currents.--II. Alternating currents.".
- 40033900 tableOfContents "I. Direct currents.--II. Alternating currents.".