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100   $a20020821d1978----km-y0itay50------ba
101 0 $aeng
105   $aa-------101yy
200 1 $aOperational modelling of the aerospace propagation environment$epapers presented at a meeting of the Electromagnetic Wave Propagation Panel, held in Ottawa, Canada, 24-28 April, 1978$fNorth atlantic treaty organization advisory group for aerospace research and development$gedited by H. Soicher
210   $aNeuilly sur seine, France$cAGARD$d1978
215   $a2 v.$cill.$d30 cm
225 1 $aAGARD conference proceedings$v238
610 0 $aOnde elettromagnetiche$aCongressi
610 0 $aPropagazione ionosferica delle onde radio
676   $a621.384'11
700  1$aNorth Atlantic Treaty Organization.$bAdvisory Group for Aerospace Research and Development
712 12$aElectromagnetic wave propagation panel$f<1978 ;$eOttawa, Canada>
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