046 TYPE OF DATE CODE, DATE 1, DATE 2 (B.C. DATES) (NR)
Indicators - Both undefined; each contains a blank (#)
Subfield Codes $a Type of date code (NR)
c - Actual date and copyright date (BK CF MP MU VM) OBSOLETE i - Inclusive dates of collection k - Range of years of bulk of collection m - Multiple dates n - Date unknown; assumed to be B.C. p - Date of distribution/release/issue and production/recording session when different q - Questionable date r - Reprint/reissue date and original date s - Single known date/probable date t - Publication date and copyright date
$b Date 1 (B.C. date) (NR) $c Date 1 (A.D. date) (NR) $d Date 2 (B.C. date) (NR) $e Date 2 (A.D. date) (NR)