Online Public Access Catalogue (OPAC)Library,Documentation and Information Science Division
“A research journal serves that narrow
borderland which separates the known from the unknown”
-P.C.Mahalanobis
511.5 Se488 111746
Serre Jean-Pierre Trees Berlin Springer Verlag 1980 ix,142p. Tr. fron French * Free groups Graph theory * Stillwell John, * Title