X00 Subfield $m - Medium of performance for music: [600, 700, 800]

Subfield $m contains term(s) designating the medium of performance used in a uniform title for a work in a name/title field.

Examples:

700 1#$aBeethoven, Ludwig van,$d1770-1827.$tSonatas,$mpiano.$kSelections.

700 12$aDebussy, Claude,$d1862-1918.$tSonatas,$mflute, viola, harp.$f1986.

Multiple adjacent elements in a single medium statement are contained in a single subfield $m. Subfield $m is repeated only when medium of performance statements are separated by subelements contained in other subfields.

Examples:

700 1#$aArne, Thomas Augustine,$d1710-1778.$tConcertos,$mkeyboard instrument, orchestra.$nNo. 3.$pCon Spirito,$mkeyboard instrument.

[Subfield $m is repeated due to intervening subelements.]

Additional examples are under the descriptions of subfields $n, $p, and $r.

To return:

Use the key.