TY  - RPRT
TI  - Electromagnetic attenuation properties of clay and gravel soils 
AU  - Ellerbruch, Doyle A
PY  - 1974
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 74-381
DO  - 10.6028/NBS.IR.74-381
ER  -