Refreshable braille is coming into prominence again as an increasing amount of data becomes available to the reader.
Provisional Guidelines for Linear Braille Format, 1987.
APH; Braille: 5‑09650‑00; Print: 7‑09650‑00; Cost: $2.50
Copies of the linear guidelines are available for purchase in hardcopy print and braille from the American Printing House for the Blind or can be downloaded from this page. See File Formats Found on the BANA Website for help.
Liner Guidelines (BRF edition)