TY  - RPRT
TI  - Letter from Germany.
AU  - O GANS
AU  - G K STEIGLEDER
DO  - 10.1111/j.1365-2133.1954.tb12642.x
UR  - https://pubmed.ncbi.nlm.nih.gov/13190115/
ID  - 13190115
ER  -