TY  - DATA
AU  - Campbell, Duff
TI  - An open door to number theory 
T2  - AMS/MAA Textbooks, 
SN  - 9781470446840 (online)
KW  -  Euclidean algorithm
KW  -  greatest common divisors
KW  - Number theory
KW  - Number theory -- Elementary number theory -- Multiplicative structure
KW  - Number theory -- Instructional exposition (textbooks, tutorial papers, etc.)
UR  - https://doi.org/10.1090/text/039
ER  -