TY - BOOK AU - Rao S B Ed. ED - symposium on combinatorics and graph theory (Febu-25-2 : Calcutta Indain statitical institute) TI - Proceeding on Combinatorics and graph theory T2 - Lecture Notes in Mathematics; 885 U1 - B44p1,N80, M1 PY - 1981/// CY - Berlin PB - Springer-Verlag ER -