1. Code of Federal RegulationsTitle 21, Section 141.2,;Fed. Regist.,1964
2. Code of Federal RegulationsTitle 21, Section 141a.2,;ibid.,1962
3. "Protocol for Collaborative Study to Evaluate Culture Media Used for Antibiotic Sterility Testing by Membrane Filtration";National Center for Antibiotics and Insulin Analysis,1970
4. Application of Membrane Filtration to Antibiotic Quality Control Sterility Testing