To my surprise I saw that LATIN SMALL LETTER TH WITH STRIKETHROUGH is accepted to UNicode.
There are a four more letters of the same type used in a popular german phonetic transscription, namely LATIN SMALL LETTER CH WITH STRIKETHROUGH LATIN SMALL LETTER DH WITH STRIKETHROUGH LATIN SMALL LETTER NG WITH STRIKETHROUGH LATIN SMALL LETTER SCH WITH STRIKETHROUGH This list is complete. For a reference see http://www.uni-mainz.de/~knappen/fremd_p8.jpg where this phonetic alphabet is explained. The scan is from Der Kleine Duden Fremdwoerterbuch 3. Auflage 1991 Dudenverlag Mannhein Wien Zuerich Pages 8 and 9 Yours, J"org Knappen
