TY  - DATA
AU  - Rao S B
TI  - Contributions to the theory of directed and undirected graphs
U1  - 513.6 
CY  - 19701970
KW  - Directed and undirected graphs
UR  - http://192.168.143.32:8080/jspui/bitstream/10263/4170/1/TH3.CV01.pdf
ER  -