Trombone Quartet Bass Trombone - Level 4 - Digital Download SKU: A0.1421878 By The Brothers Four. By Frank Miller, Richard Dehr, and Terry Gilkyson. Arranged by Jörg Richter. 20th Century,Country,Pop,Rock,Standards. 7 pages. Jörg Richter #1003212. Published by Jörg Richter (A0.1421878). An arrangement of the great American song Greenfields sung by the Brothers Four for Trombone Quartet.