TY  - RPRT
TI  - Programs for filing and X-Y plotting of isotopic and other data using an HP-9830 computer and HP-9862 plotter
AU  - K.R. Ludwig
PY  - 1982
DO  - 10.3133/ofr82385
UR  - https://pubs.usgs.gov/publication/ofr82385
ID  - ofr82385
ER  -