Elementary school mathematics :
Eicholz, Robert E.
Elementary school mathematics : getting ready 4 / Robert E. Eicholz, Phares G. O'Daffer. - 2a ed. - Menlo Park [E.U.A.] : Addison-Wesley, 1968. - 48 p. : il. - Elementary school mathematics series .
"Teacher's edition"
MATEMATICAS ---ESTUDIO Y ENSEÑANZA (ELEMENTAL) ---ESTADOS UNIDOS
Elementary school mathematics : getting ready 4 / Robert E. Eicholz, Phares G. O'Daffer. - 2a ed. - Menlo Park [E.U.A.] : Addison-Wesley, 1968. - 48 p. : il. - Elementary school mathematics series .
"Teacher's edition"
MATEMATICAS ---ESTUDIO Y ENSEÑANZA (ELEMENTAL) ---ESTADOS UNIDOS