TY  - DATA
AU  - Kirtland, Joseph.
TI  - Identification numbers and check digit schemes 
T2  - Classroom Resource Materials, 
SN  - 9781470453824 (online)
PY  - 2001///
CY  - Washington, DC
PB  - Mathematical Association of America
KW  - Check digit schemes
KW  - Number theory
N1  - Includes bibliographical references (p. 167-171) and index
UR  - https://doi.org/10.1090/clrm/018
ER  -