Libbie Henrietta Hyman <br/><br/>
The Invertebrates Vol.6- Mollusca 1, Aplacophora, Polyplacophora, Monoplacophora, Gastropoda, The Coelmate Bilateria 

 - New York  The Macmillan Company  1918 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic  Zoology