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Efficacy of universal masking for source control and person..:

William G. Lindsley (7526279) ; Donald H. Beezhold (9762481) ; Jayme Coyle (7846247)...
https://figshare.com/articles/journal_contribution/Efficacy_of_universal_masking_for_source_control_and_personal_protection_from_simulated_cough_and_exhaled_aerosols_in_a_room/14831157.  , 2021