Cross, Gwen. <br/><br/>
Mason wasps. 

 - [London] :  Longmans,  [1966] 
 - Tropical library. Friends and enemies in the garden ;  Tropical library. Friends and enemies in the garden ;  no. 1 .
<br/><br/> First published in 1950. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wasps.