TY  - BOOK
AU  - Berge, C.
AU  - 
TI  - Principles of combinatorics
T2  - Mathematics in Science and Engineering
U1  - 511.6 
PY  - 1971///
CY  - New York
PB  - Academic Press
N1  - "First published in French language under the title' Principles de combinatoire"
ER  -