Koelsch, Adolf,  1879-1948. <br/><br/>
Der blühende see, 
von Dr. Adolf Koelsch. 
 - Stuttgart,  Kosmos, Gesellschaft der Naturfruende  [1913] 
 - 95, [1] p.  illus.  21 cm. 
<br/><br/>"Wichtigste literatur": p. 94. 
<br/><br/><label>LCCN: </label>agr13000735  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aquatic plants.
<br/><br/><label>LC Class. No.: </label>QA930  / .K6