TY - RPRT TI - Sequence heterogeneity in closed simian virus 40 deoxyribonucleic acid. AU - H T Tai AU - C A Smith AU - P A Sharp AU - J Vinograd PY - 1972 DO - 10.1128/jvi.9.2.317-325.1972 UR - https://pubmed.ncbi.nlm.nih.gov/4335521/ ID - 4335521 ER -