Pratt, Henry Sherring <br/><br/>
A manual of the common invertebrate animals:   exclusive of insects 

 -  McGraw-Hill Book Company,   1935 
 - 854 p. :  il. 
<br/><br/> Incluye: introduction, list of authors, glossary, index 
<br/><br/>Protozoa.- Porifera.- Ctenophora.- Plathelminthes.- Mollusca.- Echinodermata. 
<br/><br/>1935 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrados
<br/><br/><label>Dewey Class. No.: </label>592 - Invertebrados