TY  - RPRT
TI  - An interpolation program for Texas Instruments 58/59 series programmable calculators with application to contour maps
AU  - Steven M. Condon
PY  - 1980
DO  - 10.3133/ofr80939
UR  - https://pubs.usgs.gov/publication/ofr80939
ID  - ofr80939
ER  -