The chemistry of penicillin ; report on a collaborative investigation by American and British chemists under the joint sponsorship of the Office of Scientific Research and Development, Washington, D.C., and the Medical Research Council, London / Comp. under the auspices of the National Academy of Sciences, Washington, D.C., pursuant to a contract with the Office of Scientific Research and Development. Editorial Board: Hans T. Clarke, John R. Johnson [and] Sir Robert Robinson.