(Scroll below for a video/audio overview of the book).
In p.
Middle C is located on the 4th staff line in Tenor clef, the 3rd (or middle staff line) in alto clef.
Its symbol is identical to the alto clef, also a moveable C clef.
The Tenor clef is a moveable C clef used to represent Music written in the upper ranges for those instruments.
High school instrumentalists studying the trombone, euphonium (baritone horn) cello, double bass, and bassoon will encounter the Tenor clef in advanced works. (Scroll below for a video/audio overview of the book)