00581cam 2200217 450 1786337http://id.bnportugal.gov.pt/bib/porbase/178633720030618123600.00-12-186350-641406PTBN0049557319901022d1976 k y0pory0103 baengGBOn numbers and gamesJ. H. ConwayLondonAcademic Press1976IX, 238 pL.M.S. monographs6511medeng295052ConwayJ. H.358186PTBNRPCB. 18.44, L. 6coopucmamq1750943icoopucma167280UCMA4-243