Superscript "H" in Middle Chinese readings edit

What does the superscript "H" in the Middle Chinese readings indicate? 173.88.241.33 18:17, 2 December 2017 (UTC)Reply

[1]. w:Baxter's_transcription_for_Middle_Chinese#Tones.
Please put basic effort into finding out for yourself. —suzukaze (tc) 04:41, 4 December 2017 (UTC)Reply
Return to "貝" page.