TY  - BOOK
AU  - Chartrand, Gary
AU  - Lesniak, Linda
TI  - Graphs and Digraphs 
SN  - 1584883901
U1  - 511.5 
PY  - 2005///
CY  - Boca Raton : 
PB  - Chapman and Hall/CRC Press, 
KW  - Directed Graphs
KW  - Graph Theory
N1  - YY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/1-58488-390-1.pdf
ER  -