Comparison of surface sampling methods for an extended duration outdoor biological contamination study. - Mikelonis, Anne M.; Abdel-Hady, Ahmed; Aslett, Denise; Ratliff, Katherine; Touati, Abderrahmane; Archer, John; Serre, Shannon; Mickelsen, Leroy; Taft, Sarah; Calfee, M. W. (Environmental Monitoring & Assessment, 2020)