You can't do it by arithmetic, you have to do it by algebra!
Lederman, Norman G.
You can't do it by arithmetic, you have to do it by algebra! - 1011-1013 - 29, No. 9, 1992
Marzo 1993 = JOURNAL OF RESEARCH IN SCIENCE TEACHING
EDUCACION CIENTIFICA INVESTIGACION DE CALIDAD INVESTIGACION EDUCATIVA METODOLOGIA DE LA INVESTIGACION
You can't do it by arithmetic, you have to do it by algebra! - 1011-1013 - 29, No. 9, 1992
Marzo 1993 = JOURNAL OF RESEARCH IN SCIENCE TEACHING
EDUCACION CIENTIFICA INVESTIGACION DE CALIDAD INVESTIGACION EDUCATIVA METODOLOGIA DE LA INVESTIGACION