TY  - BOOK
AU  - British Combinatorial Conference on Surveys in Combinatorics, Univ. of Surrey, July 1991
AU  - Keedwell, A. D. ; ed.
TI  - Surveys in combinatorics; proceedings of the 13th conference
U1  - 511.6 
PY  - 1991///
CY  - Cambridge
PB  - Cambridge University Press
ER  -