Hedges, H. G. <br/><br/>
Science activities  /    
H. G. Hedge, D. E. Farwell 
 - Ontario edition. 
 - Toronto :   W.J.Gage Ltd ,   1966 
 - 315 p. :    ill. ;    22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science.--------
<br/><br/><label>Dewey Class. No.: </label>372.35 HED