%0 Journal Article %A RICHMOND, M. H. %T The beta-lactam antibiotics: penicillins and cephalosporins in perspective %D 1981 %J Journal of Medical Microbiology, %V 14 %N 2 %P 229-230 %@ 1473-5644 %R https://doi.org/10.1099/00222615-14-2-229 %I Microbiology Society, %X %U https://www.microbiologyresearch.org/content/journal/jmm/10.1099/00222615-14-2-229