000 00259nam a22001097a 4500
082 _a621.38411 PRO'K
100 _aKERR, DONALD E
_973687
245 _aPROPAGATION OF SHORT RADIO WAVES
260 _aNEWYORK
_bMCGRAW HILL
_c1951
300 _a728P
942 _cBK
999 _c579338
_d579338