TY  - RPRT
TI  - Quills, ballpoints, and now computers.
AU  - R E Warren
PY  - 1985
DO  - 10.1016/s0163-4453(85)92388-6
UR  - https://pubmed.ncbi.nlm.nih.gov/4031511/
ID  - 4031511
ER  -