For citations:
Weirong D., Xin L., Wenfeng L. Analysis of screening questionnaire on chronic obstructive pulmonary disease and pulmonary function test on dust-exposed migrant workers. Russian Journal of Occupational Health and Industrial Ecology. 2019;(12):995-999. https://doi.org/10.31089/1026-9428-2019-59-12-995-999