TY - RPRT TI - Unobstrusive biomedical data-input systems. AU - I D Bross AU - A R Gregory AU - C Rathod AU - D S Bross PY - 1973 DO - 10.1016/0020-7101(73)90020-2 UR - https://pubmed.ncbi.nlm.nih.gov/4747169/ ID - 4747169 ER -