J Hyg Epidemiol Microbiol Immunol
November 1998
Cesk Epidemiol Mikrobiol Imunol
September 1959
Cesk Epidemiol Mikrobiol Imunol
July 1958
Zentralbl Bakteriol Orig
June 1958
J Hyg Epidemiol Microbiol Immunol
July 2000
J Hyg Epidemiol Microbiol Immunol
July 2000