TY  - BOOK
AU  - Stone,Cliff Winfield
TI  - Arithmetical abilities and some factors determining them ...
SN  - 0404550193
PY  - 1908///
CY  - New York
PB  - Teachers College Press
KW  - Arithmetic
KW  - Study and teaching
N1  - Vita; Thesis (Ph.D.)--Columbia uiniversity
ER  -