Ryan, Peter,   1923- <br/><br/>
The Ocean world / 
by Peter Ryan, Ludek Pesek. 
 - Harmondsworth:  Penguin Books,  1973. 
 - 48 p. :   ill. ;   21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oceanography--Juvenile literature.