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- problemi na khigienata29
- international archives of occupational and environmental health10
- stomatologiia stomatology6
- acta medica bulgarica3
- eksperimentalna meditsina i morfologiia3
- gigiena truda i professionalnye zabolevaniia3
- international archives of occupational & environmental health3
- journal of hygiene epidemiology microbiology and immunology3
- advances in pesticide science2