TY  - BOOK
AU  - British Combinatorial Conference on Surveys in Combinatorics, Norwich, April 1989
AU  - Siemons, J. ; ed.
TI  - Surveys in combinatorics; proceedings of the 12th conference
U1  - 511.6 
PY  - 1989///
CY  - Cambridge
PB  - Cambridge University Press
ER  -