The phylogeny and classification of the gerns 
/ Editors: A. C. Jermy, J. A. Crabbe and B. A. Thomas 
 - London  The Linnean Society of London by Academic Press  1973 
 - xiv, 284 p.: ill. ; 27 cm. 
<br/><br/> 'Supplement no. 1 to the Botanical journal of the Linnean Society, volume 67, 1973.'  Based on a Symposium held jointly by the British Pteridological Society and the Linnean Society of London in April 1972. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>73-007037 //r904 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ferns--Classification--Congresses<br/>Ferns--Phylogeny--Congresses