Astor Piazzolla Las Cuatro Estaciones Porteñas (The Four Seasons of Buenos Aires) is a cornerstone of modern chamber music, originally composed for his quintet between 1965 and 1970. For piano trio (violin, cello, and piano), the definitive and widely used version is the arrangement by José Bragato , a close collaborator and cellist for Piazzolla. Verified Sheet Music Sources (PDF & Hardcopy)

: This is the primary publisher for the definitive José Bragato arrangement for violin, cello, and piano. You can find verified copies at specialty retailers like Ficks Music or [Sheet Music Plus](sheetmusicplus.com, 1.4.9).