[POSTGRADUATE TRAINING FOR HYGIENE WORK].
D003604:Czechoslovakia; D004503:Education, Medical, Graduate; D006801:Humans; D006920:Hygiene; D011634:Public Health
CZECHOSLOVAKIA; EDUCATION, MEDICAL, POSTGRADUATE; HYGIENE; PUBLIC HEALTH
POSTGRADU'ALN'I V'YCHOVA HYGIENIKU PR'ACE.