Assertion: vowel's symbol | /r/ObjectUse | used for these near-schwa values
Facets:
Source sentences:
text: Before the letters [ɘ, ɵ, ɜ, ɞ] were added to the IPA in 1993, the symbols [ë, ö, ɛ̈, ɔ̈] were used for these near-schwa values.