17.2a Numbered or lettered reference markers.

When reference markers are superscript numbers or letters in print, these references are represented in braille by the asterisk, preceded by a space but followed unspaced by the number sign and the number or the letter sign and the letter. If you are transcribing a document containing multiple footnotes or footnotes with a mix of numbered and lettered reference markers, refer to Braille Formats. Examples:

He was born in 19722

He was born in 1972a