ARBETE OCH HÄLSA / UMEA UNIVERSITY ; 22 546,828 JöRGENSEN HAROLD SIHM Medical and hygienic health problems in an iron ore mine with special reference to resporatory illness: [thesis] by Harold Sihm Jorgensen ; Umea University. - Umea University, 1986?. - 117 s. wiele liczb. : il., wykr. ; 24 cm + Abstract 2s. (Arbete och Halsa / Umea University, ISSN 0346-7821 ; 22) (Umea University Medcial Dissertations New Series, ISSN 0346-6612 ; No 170) ISBN 91-7464-308-8