340 PHYSICAL MEDIUM (R)
Indicators - Both undefined; each contains a blank (^)
Subfield Codes $a Material base and configuration (R) $b Dimensions (R) $c Materials applied to surface (R) $d Information recording technique (R) $e Support (R) $f Production rate/ratio (R) $h Location within medium (R) $i Technical specifications of medium (R) $3 Materials specified (NR) $6 Linkage (NR) $8 Field link and sequence number (R)