TY - GEN AU - Clarke,B AU - Kirby,D R TI - Maintenance of histocompatibility polymorphisms SN - 0028-0836 PY - 1967///0819 KW - Female KW - Genetics, Population KW - Humans KW - Immune Tolerance KW - Maternal-Fetal Exchange KW - Pregnancy N1 - Publication Type: Journal Article UR - https://doi.org/10.1038/211999a0 ER -