Biophysical Studies of Infectious Ribonucleic Acid from Tobacco Mosaic Virus Cheo, Pen Ching ; Friesen, Benjamin S. ; Sinsheimer, Robert L. Abstract Publication: Proceedings of the National Academy of Science Pub Date: March 1959 DOI: 10.1073/pnas.45.3.305 Bibcode: 1959PNAS...45..305C