TY  - RPRT
TI  - Double thumb.
AU  - W J Boerema
AU  - B M Underhill
PY  - 1967
DO  - 10.5694/j.1326-5377.1968.tb27551.x
UR  - https://pubmed.ncbi.nlm.nih.gov/6066529/
ID  - 6066529
ER  -