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321 - FORMER PUBLICATION FREQUENCY (R)
The former frequency of either an item or an update to an item when a current frequency is contained in field 310.
Indicators
- First - Undefined
- # - Undefined
- Second - Undefined
- # - Undefined
Subfield Codes
- $a - Former publication frequency (NR)
- $b - Dates of former publication frequency (NR)
- $6 - Linkage (NR) See Control Subfields
- $8 - Field link and sequence number (R) See Control Subfields
Examples
321 |
##$aTen no. a year $b1982-1984 |
321 |
##$aMonthly $bMar. 1972-Dec. 1980 |
321 |
##$aSemiannual $b1981-1982 |
321 |
##$aFrequency varies $b1966-1983 |
321 |
##$aUpdated monthly $b1998-2000 |
321 |
##$aFrequency of update varies |

