TY  - BOOK
AU  - Assmus E F
AU  -  Key J D
TI  - Designs and their codes
T2  - Cambridge tracts in mathematics; 103
SN  - 0521413613
U1  - B28N, N2 
PY  - 1992///
CY  - Cambridge
PB  - Cambridge University Press       
KW  - Mathematics Coding Theory
ER  -