[PRINCIPAL PROBLEMS IN COMMUNICABLE DISEASE CONTROL IN 20 YEARS OF THE PEOPLE'S POLISH REPUBLIC].
D003140:Communicable Disease Control; D006801:Humans; D011044:Poland
COMMUNICABLE DISEASE CONTROL; POLAND
GL'OWNE PROBLEMY W ZWALCZANIU BHOR'OB ZAKA'ZNYCH W OKRESIE XX-LECIA POLSKIEJ RZECZYPOSPOLITEJ LUDOWEJ.