000 00289nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a052
_bHEY
100 _aHEY, J S
245 0 _aEvolution of radio astronomy
260 _aLondon
_bElek
_c1973
650 _aRadio astronomy
942 _cBK
999 _c25499
_d25499