Sheckles, Mary <br/><br/>
Building childrens scince concepts  Experiences with rocks, soil, air, and water 

 - New York  Bureau of publications  1958 
 - xiv,138  Hb  29.8 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>372.3