TY - RPRT TI - Multipoint microbiological assay for detecting beta-lactamase. AU - K J Thickett AU - T G Winstanley PY - 1991 DO - 10.1136/jcp.44.5.435 UR - https://pubmed.ncbi.nlm.nih.gov/1904456/ ID - 1904456 ER -