â¤0.2 mg/dL. Measurement of the levels of bilirubin is used in the diagnosis and treatment of liver, hemolytic, hematologic, and metabolic disorders, including hepatitis and gall bladder obstruction. The assessment of direct bilirubin is helpful in the differentiation of hepatic disorders.
Ritchie Valens. In an all too brief career, Ritchie Valens was the first Chicano rock and roll star, having his best remembered hit, La Bamba, just one month before his untimely death with Buddy Holly and the Big Bopper on February 3, 1959.
Playing guitar from a young age, Valens was an amateur performer by the time he auditioned for producer Bob Keane, of Del-Fi records, in 1958. Despite the singer's young age (Valens was still in high school), Keane recognized his talent and potential and signed him to begin recording in L.A. immediately. Valens cut four records in 1958, including his breakout hits Donna and La Bamba.