TY - RPRT TI - Thymic requirement for clonal deletion during T cell development. AU - A M Fry AU - L A Jones AU - A M Kruisbeek AU - L A Matis PY - 1989 DO - 10.1126/science.2511630 UR - https://pubmed.ncbi.nlm.nih.gov/2511630/ ID - 2511630 ER -