Empirical study on the flora of the upper respiratory tract, 190 - 01 - 04 - LD1017 .C8133 1977 C45, Volume: Archives LD1017 .C8133 1977 C45; Volume: Carlson Library Level A Main Quarto Collection RC731 .C48. Clarion University Archives. http://buoy1.klnpa.org/repositories/2/resources/341 Accessed May 01, 2025.