Parfin, Sophy I. <br/><br/>
The Spongilla-Flies, With Special Reference to Those of the Western Hemisphere (Sisyridae, Neuroptera) 

 - Washington :   Smithsonian Institution,   1956. 
 - 421 p. :   il. ;   18 cm. 
 - United States National Museum ;   Vol.105; Nš3360 .