Losh, Rosamond <br/><br/>
Primary number projects / 
by Rosamond Losh [and] Ruth Mary Weeks 
 - Boston :  Houghton Mifflin,  c1923 
 - vi, [2], 199 p. :  ill. ;  19 cm. 
 - Riverside educational monographs .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching<br/>Project method in teaching
<br/><br/><label>Dewey Class. No.: </label>511.07