TY  - RPRT
TI  - Joseph Silver Collings.
AU  - H V Crock
PY  - 1971
DO  - 10.5694/j.1326-5377.1971.tb88142.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4935651/
ID  - 4935651
ER  -