000 00249nam a22001097a 4500
082 _a621.38411
_bDOL/P
100 _aDolukhanov,M.
245 _aPropagation of Radio waves
260 _aMoscow
_bMir publishers
_c1971
300 _a372p.
942 _cBK
999 _c503783
_d503783