TY  - RPRT
TI  - General-data plot program for Hewlett-Packard 9830 calculator
AU  - Herbert H. Stevens
AU  - Thomas N. Keefer
PY  - 1975
DO  - 10.3133/ofr75489
UR  - https://pubs.usgs.gov/publication/ofr75489
ID  - ofr75489
ER  -