TY  - RPRT
TI  - Some aetiological problems in mental deficiency.
AU  - J M BERG
AU  - B H KIRMAN
PY  - 1959
DO  - 10.1136/bmj.2.5156.848
UR  - https://pubmed.ncbi.nlm.nih.gov/13799225/
ID  - 13799225
ER  -