TY  - RPRT
TI  - Attenuation of the ground wave of a low frequency electromagnetic pulse 
AU  - Morgenstern, J C
PY  - 1966
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 310
DO  - 10.6028/NBS.TN.310
ER  -