1. Fraud charged to Pfizer in tetracycline patent,1967
2. Penicillin-historical impact on infection control;HEWITT, W.L.;Ann. N. Y. Acad Sci,1967
3. Studies of drug usage in five Boston hospitals;BORDA, I.;et al,1967
4. Cross-allergenicity of penicillins and cephalosporins;Editorial;J. Amer. med. Ass,1967
5. Allergenic residues in penicillin;STEWART, G.T.;Lancet,1967