TY - BOOK AU - Benjamin, Arthur AU - Quinn, Jennifer J TI - Proofs that really count : the art of combinatorial proof SN - 883853337 SN - 200310852 U1 - 511.62 BEN PY - 2003/// CY - Wsshington, DC PB - Mathematical Association of America KW - Combinatorial enumeration problems N1 - Includes bibliographical references (p. 187-190) and index ER -