TY  - RPRT
TI  - System for plotting subsoil structure and method therefor
AU  - Narasimhan, K. Y.
AU  - Nathan, R.
AU  - Parthasarathy, S. P.
PY  - 1980
UR  - https://ntrs.nasa.gov/citations/19800024076
ID  - 19800024076
ER  -