two , 3 , and 4 days after transplantation , the proliferating descendants of transplanted bone-marrow cells were identified on radioautographs of spleen sections and on spleen and bone-marrow smears of supralethally irradiated recipient mice which were injected with 3h-tdr at 12 , 6 , and 0.5 hours before sacrifice .
C0005955
of
C0005953
bone-marrow