Specimens of Hydroid species described by the Showa emperor Hirohito. 

 - Tokyo :   Showa Memorial Institute, National Science Museum,   2004. 
 - iii, 139 p. 
 - Catalogues of the Collections in the Showa Memorial Institute, National Science Museum ;   n. 2 .
<br/><br/><label>ISBN: </label>4878030070 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydroida.
<br/><br/><label>Dewey Class. No.: </label>591.074