TY  - RPRT
TI  - Relationships between radio propagation disturbance and central meridian passage of sunspots grouped by distance from center of disc 
PY  - 1946
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IRPL 27
DO  - 10.6028/NBS.IRPL.27
ER  -