TY  - RPRT
TI  - Direct retainers for distal-extension removable partial dentures.
AU  - R P Frank
PY  - 1986
DO  - 10.1016/0022-3913(86)90422-1
UR  - https://pubmed.ncbi.nlm.nih.gov/3534227/
ID  - 3534227
ER  -