TY  - BOOK
AU  - Spiegel, Eugene
AU  - O,Donnell, Christopher J.(jt.auth)
TI  - Incidence algebras
SN  - 0824700368
U1  - 512.24 
PY  - 1997///
CY  - New York
PB  - Marcel Dekker
KW  - Incidence algebras
N1  - Includes bibliography and index
ER  -