00888nam a2200241 i 450099100112310970753620020507111609.0970308s1976 us ||| | eng b10176913-39ule_instLE00642536ExLDip.to Fisicaita52.9.5(047)52.9.54Mushotzky, Richard Fred463120Observations of hard X-rays extragalactic objects /Richard Fred MushotzkySan Diego :University of California,1976152 p. ;28 cm..b1017691321-09-0627-06-02991001123109707536LE006 52.9.54 MUS12006000029131le006-E0.00-l- 00000.i1021703427-06-02Observations of hard X-rays extragalactic objects189275UNISALENTOle00601-01-97ma -engus 01