545,144 GRAHN EVA Bacteriological aspects of treatment failures in streptococcal tonsillitis : [thesis] / by Eva Grahn ; University of Umea. — Umea : University, 1986. - 59, [104] s. : il., kol. wykr. ; 25 cm + Abstract :2s. (Umea University Medical Dissertations, ISSN 0346-6612. New Series ; no 173) Zawiera 6 prac wspolaut.