[DUST AMOUNT IN THE SPAS OF EASTERN BOHEMIA].
D003604:Czechoslovakia; D004391:Dust; D006294:Health Resorts; D006801:Humans
D004391:Dust
CZECHOSLOVAKIA; DUST; HEALTH RESORTS
PRA SNOST OVZDU S'I JIHO CESK'YCH L'AZN'I.