Entry Topical Term

Number of records used in: 4

001 - CONTROL NUMBER

• control field: 38061

003 - CONTROL NUMBER IDENTIFIER

• control field:

005 - DATE AND TIME OF LATEST TRANSACTION

• control field: 20210601181042.0

008 - FIXED-LENGTH DATA ELEMENTS

• fixed length control field: 210601|| aca||aabn | a|a d

040 ## - CATALOGING SOURCE

• Original cataloging agency:
• Transcribing agency:

150 ## - HEADING--TOPICAL TERM

• Topical term or geographic name entry element: Triodes

670 ## - SOURCE DATA FOUND

• Source citation: Work cat.: (): Hallows, R.W. 35737, Introduction to valves/, 1953