agard lecture series Radio wave propagation Radio-ontvangst in theorie en practijk : Grondbeginselen en eerste ontwikkeling der radio-ontvangtechniek / R. Swierstra electromagnetic field within a discontinuous conductor with reference to geomagnetic micropulsations near a coastline / by J.T. Weaver Practical transmission line network designs for V.H.F. and U.H.F. filter applications reprint / pacific naval laboratory Some characteristics of electromagnetic background signals in the vicinity of one cycle per second / J.E. Lokken, J.A. Shand and C.S. Wright
