TY  - RPRT
TI  - Essential and nonessential trace elements. A method of determining whether an element is essential or nonessential in human tissue.
AU  - K Liebscher
AU  - H Smith
PY  - 1968
DO  - 10.1080/00039896.1968.10665346
UR  - https://pubmed.ncbi.nlm.nih.gov/5699297/
ID  - 5699297
ER  -