Data-acquisition system for radon monitoring /
by Franklin, J. C. ...[et al.]
- [Washington, D.C.] : U.S. Dept. of the Interior, 1976.
- 19 p. : ill, map.
- Report of investigations / Bureau of Mines, U.S. Department of the Interior ; 8100 .
- Report of investigations (U.S. Department of the Interior. 8100 .