EPIDEMIOLOGICAL STUDY OF SICKNESS ABSENCE WITH SPECIFIC ATTENTION TO ABSENCE DUE TO BACK PAIN AMONG COAL MINERS
DETERMINATION OF LEAD IN THE ENVIRONMENT AND IN THE URBAN SERVICE WORKERS IN A TEHRAN MANICIPILITY DISTRICT
ISOLATION OF PATHOGENIC AMOEBA (NAEGLERIA AND ACANTHAMEOBA) FROM WATER SOURCESAND MARGIN SOILS OF REVEIRS AND LAKES IN KAZERUN
A QUANTITATIVE STUDY OF ENZYME LEVELS IN THE FLUIDS OF STERILE AND FERTILE ECHINOCOCCUS GRANULOSUSCYSTS IN SHEEP