TY - RPRT TI - A computer program to aid in visual concept development in dentistry. AU - E S Wallen AU - T M Schulein AU - L A Johnson PY - 1997 DO - 10.1016/s0169-2607(96)01787-7 UR - https://pubmed.ncbi.nlm.nih.gov/9034675/ ID - 9034675 ER -