Butcher, R. W., <br/><br/>
An introductory account of the smaller algae of british coastal waters :  Part IV: Cryptophyceae / 
R. W. Butcher. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CLAVES DE IDENTIFICACION.<br/>CRYPTOPHYCEAE.<br/>MICROALGAS.