KALMUS STUDY SCORES LUDWIG VAN BEETHOVEN No. 1013 Trios for Piano, Violin and Cello NO. 79 No. 1 Trio, Op. 1 No. 1 in Es 80 No. 2 Trio, Op.1 No.2 in G 81 No. 3 Trio, Op. 1 No. 3 in Cm 82 No.4 Trio, Op. 70 No. 1 in D Other piano trios may be found in volumes 1014, 1015, 1016