TY - GEN AU - Johnson,G R AU - Barker,D C TI - Erythroid progenitor cells and stimulating factors during murine embryonic and fetal development SN - 0301-472X PY - 1985///0508 KW - Animals KW - Colony-Forming Units Assay KW - Colony-Stimulating Factors KW - analysis KW - Embryo, Mammalian KW - cytology KW - Embryonic and Fetal Development KW - Erythrocytes KW - metabolism KW - Erythropoiesis KW - Erythropoietin KW - physiology KW - Female KW - Hematopoietic Stem Cells KW - Liver KW - embryology KW - Mice KW - Mice, Inbred BALB C KW - Mice, Inbred C57BL KW - Mice, Inbred CBA KW - Pregnancy KW - Yolk Sac N1 - Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S ER -