TY  - RPRT
TI  - Nail-biting in twins.
AU  - H Bakwin
PY  - 1971
DO  - 10.1111/j.1469-8749.1971.tb03265.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5093291/
ID  - 5093291
ER  -