Tropical lichens  their systematics, conservation and ecology 
edited by D. J. Galloway 
 - Oxford  Published for the Systematics Association by Clarendon  1991 
 - 302 p. ; 24 cm. 
<br/><br/><label>ISBN: </label>0198577206 
<br/><br/><label>LCCN: </label>90-044333 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lichens--Tropics--Congresses