TY  - DATA
AU  - Sagan, Bruce Eli,
TI  - Combinatorics: the art of counting 
T2  - Graduate Studies in Mathematics, 
SN  - 9781470462802 (online)
PY  - 2020///
CY  - Providence, R.I.
PB  - American Mathematical Society
KW  - Combinatorial analysis
KW  - Combinatorics {For finite fields, see 11Txx} -- Instructional exposition (textbooks, tutorial papers, etc.)
KW  - Order, lattices, ordered algebraic structures [See also 18B35] -- Instructional exposition (textbooks, tutorial papers, etc.)
N1  - Includes bibliographical references and index
UR  - https://doi.org/10.1090/gsm/210
ER  -