000 00293nam a2200133 a 4500
003 DLC
005 20210219152749.0
035 _aUPN01000060302
245 0 0 _aERS BULLETIN
260 _aEUA :
_bEducational Research Service,
_c1973
310 _aMensual
905 _aRevista
999 _c60117
_d60117