“…b;Atkin and Ross, 1960); (3) the finding of the same marker represented twice in the same cell (Miles, 1967a, b; (4) the occasional finding of 4n or near-4n tumours (Miles et al, 1966;Spiers and Baikie, 1968;Lubs and Clark, 1963;Spriggs, Boddington and Clarke, 1962;Lubs and Salmon, 1965;Ricci et al, 1962).…”