TY - RPRT TI - Chromosome abnormalities and maternal age. AU - P E Polani AU - E Alberman AU - A C Berry AU - S Blunt AU - J D Singer PY - 1976 DO - 10.1016/s0140-6736(76)90806-0 UR - https://pubmed.ncbi.nlm.nih.gov/74476/ ID - 74476 ER -