School Mathematics Study Group. (1966). Inservice course in mathematics for primary school teachers (rev. ed.). Leland Stanford Junior University.
Dyfyniad Arddull ChicagoSchool Mathematics Study Group. Inservice Course in Mathematics for Primary School Teachers. rev. ed. Stanford, CA: Leland Stanford Junior University, 1966.
Dyfyniad MLASchool Mathematics Study Group. Inservice Course in Mathematics for Primary School Teachers. rev. ed. Leland Stanford Junior University, 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.