Lakela, Olga. <br/><br/>
A check list of ferns and flowering plants of the Quetico Wilderness Research Center 

<br/><br/> Sobretiro de: American Midland Naturalist. 50(2) : 488-500, 1953 
<br/><br/><label>LCCN: </label>28042 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleobotánica.