000 00297nam a2200109 i 4500
008 910305s1972 sp g spa
080 1 _a537
100 _aRYDER,JOHN D.
245 0 _aELECTRONICA
260 _aMADRID.
_b:CELTIC REVISION AIDS.
_c,1972
997 _dFalta ISBN
_e1