TY  - RPRT
TI  - PGs (picograms) for PGs (postgraduates).
AU  - P C Doehring
PY  - 1970
DO  - 10.1056/nejm197004022821430
UR  - https://pubmed.ncbi.nlm.nih.gov/5416992/
ID  - 5416992
ER  -