Normal view
MARC view
- Signal Circuits
Entry Topical Term
001 - CONTROL NUMBER
- control field: 19255
003 - CONTROL NUMBER IDENTIFIER
- control field: ByWater
005 - DATE AND TIME OF LATEST TRANSACTION
- control field: 20180521115950.0
008 - FIXED-LENGTH DATA ELEMENTS
- fixed length control field: 180521|| aca||aabn | a|a d
040 ## - CATALOGING SOURCE
- Original cataloging agency: ByWater
- Transcribing agency: ByWater
150 ## - HEADING--TOPICAL TERM
- Topical term or geographic name entry element: Signal Circuits
670 ## - SOURCE DATA FOUND
- Source citation: Work cat.: (ByWater): Scott, Ralph 19253, Automatic block signals and signal circuits :, 2017.