Challand, Helen J. . <br/><br/>
375 things to do in Science and nature /  Textual Documents 
Helen J.Challand & Elizabeth R.Brandt. 
 - 1st ed. / 
 - London :  Odhams ,  1964. 
 - 221p. :  ill ;  26cm. . 
<br/><br/><label>ISBN: </label>0 600 71581 7 
<br/><br/><label>Subjects--Index Terms: </label>Things-Science 
<br/><br/><label>Dewey Class. No.: </label>001  / C 351 T