1. Studies of Simian virus 40 DNA
2. Nucleotide Sequence from the Coat Protein Cistron of R17 Bacteriophage RNA
3. Bethesda Research Laboratories, Rockville, Maryland; Boehringer Mannheim, Indianapolis, Indiana; Miles Laboratories, Inc., Elkhart, Indiana; New England Biolabs, Beverly, Massachusetts.
4. See this volume, Section III.
5. R. D. Wells et al., this volume, Article [41].