Ishihara, Tadashige, <br/><br/>
On the cut-off process in the universal Hilbert space / 
by Tadashige Ishihara.. 
 - Tokyo :  Japan Academy,  1964 
 - 734-739 pages ;   26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Topology.