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245 _aERIC on CD-ROM
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246 _aERIC
260 _a[Baltimore, MD.] :
_bNational Information Service Corporation,
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300 _acomputer laser optical discs ;
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650 _aEducation
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_xComputer network resources.
650 _aEducation
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856 _uhttp://www.nisc.com
856 _uhttp://www.accesseric.org/
907 _a.b13016179
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_c2019-11-12
942 _c1
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