TY  - BOOK
AU  - Biggs N L
AU  -  White A T
TI  - Permutation groups and combinatorial structures
T2  - London mathematical society lecture notes series; 33
U1  - B217, L91 
PY  - 1979///
CY  - Cambridge
PB  - University Press        
KW  - Permutation and combination
ER  -