TY  - RPRT
TI  - Germinal centre B cells: antigen specificity and changes in heavy chain class expression.
AU  - G Kraal
AU  - I L Weissman
AU  - E C Butcher
PY  - 1982
DO  - 10.1038/298377a0
UR  - https://pubmed.ncbi.nlm.nih.gov/6806671/
ID  - 6806671
ER  -