TY  - RPRT
TI  - Texas Instruments Model 59 hand-calculator program for interpretation of refraction seismic data over up to four dipping layers
AU  - David L. Campbell
PY  - 1979
DO  - 10.3133/ofr791662
UR  - https://pubs.usgs.gov/publication/ofr791662
ID  - ofr791662
ER  -