Pérez de G. MA, Trujillo Soto H. Effectiveness of the estolate of erythromycin, ampicillin, and cefachlor in group A streptococcal tonsillopharyngitis. Med UPB [Internet]. 1983 Dec. 15 [cited 2026 Aug. 11];2(2):49-52. Available from: https://revistas.upb.edu.co/index.php/medicina/article/view/6453