TY  - DATA
AU  - Rao A Ramachandra
TI  - Some extremal problems and characterizations in the theory of graphs
U1  - 513.6 
CY  - 19691969
KW  - Graph Theory
UR  - http://192.168.143.32:8080/jspui/bitstream/10263/3602/1/TH76.pdf
ER  -