TY  - BOOK
AU  - Liebling Thomas M
TI  - Graphentheorie in planungsund tourenproblemen
T2  - Lecture notes in operations research and mathematical systems; 21
U1  - B2893, 113L0 
PY  - 1970///
CY  - Berlin
PB  - Springer Verlag      
KW  - Operational research
ER  -