TY - RPRT TI - Model system using coliphage phi X174 for testing virus removal by air filters. AU - M L Rapp AU - T Thiel AU - R J Arrowsmith PY - 1992 DO - 10.1128/aem.58.3.900-904.1992 UR - https://pubmed.ncbi.nlm.nih.gov/1575491/ ID - 1575491 ER -