Examples are hymns, anthems, and songbooks. It is also part of several other hymnals and songbooks. Rival editions and variations multiplied in songbooks, newspapers and broadsides. These songbooks may contain a variety of songs from 18th-century classics to 20th-century gospel music. Music print publishers also supervise the issue of songbooks and sheet music by their artists. Beskow also illustrated ABC books and songbooks for Swedish schools. He has released ten albums, including a compilation album, and two songbooks. Songbooks and guitar magazines usually include a legend setting out the convention in use. The Optigan's songbooks were written and arranged by Optigan Corporation's music director, Johnny Largo. The collection includes diverse cultural material including poetry, novels, prints, playscripts, songbooks and audio-visual material. The song's chorus is widely known and appears in many children's songbooks. Numerous songbooks are printed in shaped notes for this market. Russia remained limited to a few primers, songbooks and leaflets. Songbooks and microphones also rest on the bar. Church songbooks are also common in Roman Urdu.