00660nam a22002171 4500 1/18415 011219s1978 enk 1 eng d 0121117502 18955 DLC GR-PeUP 511.5 BO Bollobas, Bela. Extremal graph theory / Bela Bollobas London : Academic Press, 1978 xx, 488 p. : graphs ; 24 cm. L.M.S. monographs ; Includes indexes Graph theory. Extremal problems (Mathematics). L.M.S. monographs ; 11 INST UNIPILB MAIN 20040709 511.5 BO 00137858 00137858 LOAN 0 1