00310nam a2200109Ia 4500008004100000082001900041100001700060245004700077260002700124300001000151440003900161260910b        |||||||| |||| 00| 0 eng d  a515.7bW672.CG  aWilde, M. De  aClosed graph theorems and webbed spacesb/  aLondon:bPitman,c1978  a158p.  aResearch notes in Mathematics ; 19