Osborne, Mary Pope. <br/><br/>
Dolphins and sharks  a nonfiction companion to Dolphins at daybreak 
Mary Pope Osborne 
 - 1st ed. 
 - [S.l.]  Random House  2003 
 - 118 p. 
 - Magic tree house research guide .
 - Magic tree house research guide .
<br/><br/><label>ISBN: </label>032933221X 0375823778 (trade) 0375923772 (lib. bdg) 1413103561