TY  - BOOK
AU  - Prince,John T.
TI  - Arithmetic by grades: for inductive teaching, drilling and testing : book number one 
AV  - QA 103 P94.1899
PY  - 1899///
CY  - Boston
PB  - Ginn
KW  - Aritmética
KW  - Problemas, ejercicios, etc
N1  - Numbers from 1 to 20
ER  -