TY  - GEN
AU  - Wallis,W.D
TI  - Combinatorial designs
T2  - Pure and applied mathematics
SN  - 0824779428
U1  - 511/.6 
PY  - 1988///
CY  - New York
PB  - M. Dekker
KW  - Combinatorial designs and configurations
N1  - Cuprinde bibliogr. si index
ER  -