Heederick D, Brouwer R, Biersteker K, Boleij JSM.Relationship of airborne endotoxin and bacteria levels in pig farms with the lung function and respiratory symptoms of farmers. Int Arch Occup Environ Health. 1991;62:595–601. https://www.researchgate.net/publica tion/252780209_Chapter_30_Air_Quality_Issues.

Heederick D, Brouwer R, Biersteker K, Boleij JSM.Relationship of airborne endotoxin and bacteria levels in pig farms with the lung function and respiratory symptoms of farmers. Int Arch Occup Environ Health. 1991;62:595–601. https://www.researchgate.net/publica tion/252780209_Chapter_30_Air_Quality_Issues.acs-admin2022-10-06T23:33:47+00:00