Angel, Heather. <br/><br/>
The world of an estuary / 
Heather Angel ; with line drawings by Christine Darter. 
 - London :  Faber,  1974. 
 - 128 p. :  ill. 
<br/><br/><label>ISBN: </label>0571103782 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estuarine biology--Juvenile literature.