Watson, E. Vernon  1914- <br/><br/>
British mosses and liverworts :  an introductory work, with full descriptions and figures of over 200 species and keys for the identification of all except the very rare species / 
written and illustrated by E. Vernon Watson ; with a foreword by Paul Richards 
 - Cambridge :  The University Press,  1955 
 - 419 p. :  ill. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mosses--Great Britain<br/>Liverworts