Children discover arithmetic: an introduction to structural arithmetic. Text: Catherine Stern, foreword: Marguerite Lear.
R652293. Children discover arithmetic: an introduction to structural arithmetic. Text: Catherine Stern, foreword: Marguerite Lear. © 16Mar49; A32020. Fritz Stern & Toni Gould (C of Catherine Stern); 21Jan77; R652293.
Fritz Stern & Toni Gould|C of Catherine Stern