TY - GEN AU - Porter,E H TI - Estimation of extrapolation numbers SN - 0007-1285 PY - 1970///0504 KW - Clone Cells KW - Culture Techniques KW - Mathematics KW - Radiation Effects N1 - Publication Type: Journal Article UR - https://doi.org/10.1259/0007-1285-43-507-224-c ER -