TY  - BOOK
AU  - Chartrand,Gary
AU  - Lesniak,Linda  .
AU  - Zhang,Ping  .
TI  - Graphs and digraphs / 
SN  - 9781439826270
U1  - 511.5 
PY  - 2011///
CY  - New York : 
PB  - CRC Press , 
KW  - GRAPH THEORY
N1  - Includes bibliography and index
ER  -