TY - RPRT TI - Bolus placement during mastication. AU - I M Sheppard AU - S Rakoff AU - S M Sheppard PY - 1968 DO - 10.1016/0022-3913(68)90188-1 UR - https://pubmed.ncbi.nlm.nih.gov/5246765/ ID - 5246765 ER -