Johnsen, Jan <br/><br/>
Gardening without soil / 
by Jan Johnsen 
 - New York :  Lippincott,  1979 
 - 83 p. :  ill. ;  24 cm . 
<br/><br/>Bibliography : p . 77 Includes index 
<br/><br/><label>ISBN: </label>0397317298 0397318685 (library ed.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydroponics--Juvenile literature<br/>Hydroponics<br/>Gardening