title: [Studies on synergistic action against penicillin and cephalosporin resistant bacteria. I: laboratory studies].
mesh_terms: D002511:Cephalosporins / Q000494:pharmacology*; D004357:Drug Synergism; D004926:Escherichia coli / Q000187:drug effects; D007709:Klebsiella / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology*; D011549:Pseudomonas / Q000187:drug effects
chemical_list: D002511:Cephalosporins; D010406:Penicillins