This very tiny, out of print, 40 page, booklet covers, ever so briefly, the subject of how to speak in a feminine manner.  It touches on the basics of speech production, intonation and inflection, and very lightly on surgery, non-verbal communication, and the state of mind needed to effect a more feminine voice.  There is nothing here, however, which cannot be garnered from the many Internet web sites which also cover this subject.  However, as a reference document it could come in handy for a quick refresher from time to time. (If you can find it.)