TY  - RPRT
TI  - Introductory remarks.
AU  - H F BLUM
PY  - 1957
DO  - 10.1111/j.1749-6632.1957.tb49661.x
UR  - https://pubmed.ncbi.nlm.nih.gov/13479003/
ID  - 13479003
ER  -