Clements, M. A. (Ken).

Using design research and history to tackle a fundamental problem with school algebra by: Clements, M. A. (Ken).; Ellerton, Nerida F.; Kanbir, Sinan.; SpringerLink (Online service) (Electronic resources)

Abraham Lincoln's cyphering book and ten other extraordinary cyphering books by: Clements, M. A. (Ken).; Ellerton, Nerida F.; SpringerLink (Online service) (Electronic resources)