552,267 ARSTILA TUULA Beta-lactam resistance among Escherichia coli and Klebsiella Species : [thesis] / by Tuula Arstila j from the Department of Medical Microbiology and the National Public Health Institute. - Turku : Turun Yliopisto, 1994. - 63, [29] s. : il. , wykr. ; 25 cm (Annales Universitatis Turkuensis. Ser. D : Medi-ca-Odontologica, ISSN 0355-9483 ; 149) Zawiera 5 prac współaut. ISBN 951-29-0278-8