=LDR           a22        4500
=001  6416
=003  GR-ArMPA
=245  00$aALGEBRAIC HYPERSTRUCTURES AND APPLICATIONS
=260  \\$c1997
=300  \\$a170 p.
=541  \\$aΕΘΝΙΚΗ ΒΙΒΛΙΟΘΗΚΗΣ ΕΛΛΑΔΑΣ
=650  \4$aΑΛΓΕΒΡΑ