PT Journal AU Vihma, T SO Scandinavian Journal of Work, Environment & Health PD VL PY 1981 BP 0 IS 3 WP https://www.sjweh.fi/show_abstract.php?abstract_id=3056 DE amendment and correction; classification; Finland; health hazard; health problem; industry; occupational health problem; occupational title; prevalence study; small industry; stress factor SN 0355-3140 ER