000 00291nam a22000977a 4500
008 230926b |||||||| |||| 00| 0 eng d
040 _aNational Science Library
_cNational Science Library
245 _aJournal of combinatorial theory
260 _aLondon:
_bAcademic Press,
942 _cCR
_2udc
999 _c61954
_d61954