DeSeyn, Donna E- <br/><br/>
Teaching earth science with investigations and behavioral objectives/ 
Donna E. DeSeyn. 
 - West Nyack, N.Y.  Parker Publishing Company  1973 
 - 227 p. :   ill. ;   24 cm. 
<br/><br/><label>ISBN: </label>0138924716 
<br/><br/><label>LCCN: </label>73-012633 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth sciences--Study and teaching (Elementary)