Generally, a [d] and a yogh, sometimes with a ligature connecting them.

Sometimes, also, a [j] with a thingee-- reverse circumflex? I learned it as a 'hachek', no idea how it's spelled, but the professor was Polish and I don't know whether that's an English word or not-- thingee in place of the dot. You wouldn't use this in phonetics-- it doesn't show that the sound is an affricate, made up of two componant sounds-- but in phonology you might, if that sound were always treated as a single segment.