["Medical \/ History","SCIENCE \/ Life Sciences \/ Microbiology","SCIENCE \/ Research & Methodology","Penicillin;History.","Penicillin;History;Popular works.","BACTERIOLOGY","General Adult","Great Britain\/British Isles","History","Medical \/ History","Non-Fiction","Penicillin;History.","Penicillin;History;Popular works.","SCI\/TECH","SCIENCE \/ Life Sciences \/ Microbiology","SCIENCE \/ Research & Methodology","SCIENTIFIC METHODOLOGY AND RESEARCH","SPECIFIC DRUGS","Science\/Math","United States"]