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Study on occupational ventilatory defects among workers emp..:

Payel Sarkar ; Daliya Biswas ; Eashin Gazi.
http://www.ijcfm.org/article.asp?issn=2395-2113;year=2022;volume=8;issue=1;spage=28;epage=32;aulast=Sarkar.  , 2022