TY - RPRT TI - Laboratory quality control using patients results. AU - J A Owen AU - D G Campbell AU - D Fenwick AU - P F McCleary PY - 1968 DO - 10.1016/0009-8981(68)90167-8 UR - https://pubmed.ncbi.nlm.nih.gov/5655828/ ID - 5655828 ER -