Farquhar, Guettler, Johnson, Rea, Sankey, Seger and Tabakov . DOUBLE BASS SOLO. A collection of short works of varying difficulty by composers of various nationalities. Includes works by David Farquahar, Knut Guettler, Michael Johnson, Alan Rea, Stuart Sankey, Jan Segers and Emil Tabakov. This book contains pieces currently on exam syllabuses: Double Bass TG: Perf Cert Pieces are approximately Grade: 5 standard.