TY  - RPRT
TI  - Letter: Tryptophan in depression.
AU  - S Montgomery
AU  - A Coppen
PY  - 1974
DO  - 10.1016/s0140-6736(74)91170-2
UR  - https://pubmed.ncbi.nlm.nih.gov/4138420/
ID  - 4138420
ER  -