Front cover image for Number by development, a method of number instruction ..

Number by development, a method of number instruction ..

Print Book, English, [©1910-19]
J.B. Lippincott Company, Philadelphia, [©1910-19]
3 volumes frontispiece, illustrations, plates 20 cm
2157334
[v. 1] Primary
v. 2. Intermediate grades
v. 3. Grammar grades