00465nam a2200097Ia 4500008004100000082001900041100002600060245022000086260005100306300001000357251029b        |||||||| |||| 00| 0 eng d  a511.5bB575.CT  aBhaskara Rao, Siddani  aContributions to the theory of directed and undirected graphsb: a thesis submitted to the Indian Statistical Institute in partial fulfilment of the requirements for the award of the degree of Doctor of Philosophy /  aCalcutta:bIndian Statistical Institute,c1970  a152p.