Mega –bill, :the act on supporting the development of telecommunications services and networks goals, new possibilities, problems. 10 March 2011 r.
VARIABILITY OF TOTAL ELECTRON CONTENT AT EUROPEAN LATITUDES A. Krankowski(1), L. W. Baran(1), W. Kosek (2), I. I. Shagimuratov(3), M. Kalarus (2) (1) Institute.
VARIABILITY OF TOTAL ELECTRON CONTENT AT EUROPEAN LATITUDES
