TY - RPRT TI - Syphla-Chek: a qualitative study. AU - P E Dziuk AU - D A Black AU - B L Therrell PY - 1977 DO - 10.1128/jcm.5.6.593-595.1977 UR - https://pubmed.ncbi.nlm.nih.gov/886001/ ID - 886001 ER -