TY  - RPRT
TI  - Letter: Lassa by letter.
AU  - D I Simpson
AU  - A J Zuckerman
PY  - 1975
DO  - 10.1016/s0140-6736(75)90792-8
UR  - https://pubmed.ncbi.nlm.nih.gov/52067/
ID  - 52067
ER  -