TY  - RPRT
TI  - LED's: convenient, inexpensive sources for visual experimentation--a modified circuit.
AU  - A B Alden
PY  - 1983
DO  - 10.1016/0042-6989(83)90049-4
UR  - https://pubmed.ncbi.nlm.nih.gov/6868377/
ID  - 6868377
ER  -