TY - GEN AU - Lewin,R TI - NAS study highlights chemical mutagens. Heritable genetic defects caused by exposure to chemicals might be a big medical problem. A premarketing screen for such chemicals is proposed SN - 0036-8075 PY - 1983///0415 KW - Mutagenicity Tests KW - Mutation N1 - Publication Type: News UR - https://doi.org/10.1126/science.6828857 ER -