Field studies on the competition between purple and green sulfur bacteria for available light lake siso spain Abella, C.; Montesinos, E.; Guerrero, R. Dokulil, M , H Metz And D Jewson (Ed ) Developments in Hydrobiology, Vol 3 Shallow Lakes Contributions to Their Limnology; Meeting, Illmitz, Austria, Sept 23-30, 1979 Xii+212p W Junk Bv Publishers: The Hague, Netherlands; Boston, Mass, Usa Illus P173-182, 1980 1981 https://eurekamag.com/research/028/336/028336796.php