D.S. Mitchell. P.A. Thomas <br/><br/>
Ecology of water weeds in the neotropics:  an ecological survey of the aquatic weeds 𝘌𝘪𝘤𝘩𝘩𝘰𝘳𝘯𝘪𝘢 𝘤𝘳𝘢𝘴𝘴𝘪𝘱𝘦𝘥𝘦𝘴 and 𝘚𝘢𝘭𝘷𝘪𝘯𝘪𝘢 species, and their natural enemies in the neotropics / 
by D. S. Mitchell and P.A. Thomas. 
 - Paris:  UNESCO,  1972. 
 - 50p.;  illustrations. 
 - Technical papers in hydrology  12 .
<br/><br/> Includes bibliographical references. 
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