6.7B19. Publishers' numbers
When applying rule 6.7B19 to include the label name and number in a note, make this note the first one.
Transcribe spaces and hyphens in the publisher’s numbers on sound recordings as they appear. Separate the first and last numbers of a sequence by a dash.
When the item bears both a set number and numbers for the individual items (e.g., discs), give only the set number unless it does not appear on the individual items; in that case give the set number first, followed by the numbers of the individual items in parentheses.
Give matrix numbers only if they are the only numbers shown on the item. Follow each matrix number by the word matrix in parentheses.
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