00831nam0-22002771i-450-990001321700403321000132170FED01000132170(Aleph)000132170FED0100013217020000920d1988----km-y0itay50------baengCombinatorial configurations designs codes graphsVladimir D. Tonchev.Harlow (UK)Longman1988.189 p.24 cmPitman monographs and surveys in pure and applied mathematics40511.6Tonchev,Vladimir D.59890ITUNINARICAUNIMARCBK990001321700403321C-18-(408860MA1MA1Combinatorial configurations designs codes graphs382991UNINAING01