John McGavack <br/><br/>
Crystals, Insects and unknown objects : A creative approach to the teaching of science to intermediate school children 

 - New York  John Day Company  1971 
 - 272p 
<br/><br/>John McGavack & Donald P Lasalle: Crystals, Insects and unknown objects : A creative approach to the teaching of science to intermediate school children.  New York.  John Day Company, 1971.--(372.35MCG)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>372.35  / McG