TY - RPRT TI - ISOPLOT for MS-DOS, a plotting and regression program for radiogenic-isotope data, for IBM-PC compatible computers, version 1.00 AU - K.R. Ludwig PY - 1988 DO - 10.3133/ofr88557 UR - https://pubs.usgs.gov/publication/ofr88557 ID - ofr88557 ER -