TY  - RPRT
TI  - The two signal model for b cell induction.
AU  - P A Bretscher
PY  - 1975
DO  - 10.1111/j.1600-065x.1975.tb00147.x
UR  - https://pubmed.ncbi.nlm.nih.gov/49104/
ID  - 49104
ER  -