000 00380nam a2200145Ia 4500
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100 _aBIJLEVELD(Willem)
245 _a"Groups and clusters of galaxies, radio and x-ray studies. Ph.D Thesis"
260 _aSterrewacht Leiden
260 _c1984
300 _a107 p.
942 _cBooks
999 _c15688
_d15688