1.
Combinatorial Matrix Theory
by Brualdi, Richard A., Ryser, Herb...
ISBN-13: 9780521322652
ISBN-10: 0521322650
Hardcover, 1991
List Price: $168.00
2.
Combinatorial Mathematics
by Ryser, Herbert J.
ISBN-13: 9780883850145
ISBN-10: 0883850141
List Price: $15.00
