TY  - BOOK
AU  - Losh,Rosamond
AU  - Weelg,Ruth Mary
AU  - Suzzallo,Henry
TI  - Primary numbers projects
U1  - 511.07 
PY  - 1923///
CY  - Boston
PB  - Houghton Mifflin
KW  - Logic, Symbolic and mathematical
KW  - Mathematics
KW  - Arithmetic
KW  - Study and teaching
KW  - Project method in teaching
N1  - Includes index
ER  -