TY  - BOOK
AU  - Behzad,Mehdi
AU  - Chartrand,Gary
AU  - 
TI  - Graphs & digraphs
SN  - 0871502615
PY  - 1979///
CY  - Belmont, Ca.
PB  - Wadsworth International Group
KW  - Graph theory
N1  - Includes index; Bibliography: p.  383 -401
ER  -