TY - RPRT TI - A modified rubella HI test using prestandardized reagents. AU - G E Urquhart AU - D A Worswick AU - N R Grist PY - 1976 DO - 10.1136/jcp.29.12.1101 UR - https://pubmed.ncbi.nlm.nih.gov/1010879/ ID - 1010879 ER -