Gibbs, Margaret (Margaret Alice) <br/><br/>
Living things :  teachers' reference book. 

 - London :  Chatto & Windus,  1956. 
 - Course in nature study .
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology -- Study and teaching (Elementary)--Biology -- Study and teaching (Elementary)