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References
1.
Commoner, B.
(1968 ). The Balance of Nature . J. Soil Assoc.
15 , 71 .
2.
Edwards, R.W.
(1968 ). Plants as Oxygenators in Rivers. Water Research , Pergamon . 243 .
3.
Eden, Sir T.
(1950 ). Durham . The County Books, R. Hale Ltd . 2 .
4.
Martin, D.S.
(1968 ). Abstraction from Chalk Streams . Flyfisher's Journal , 31 , 51 .
5.
Webster, L.F.
(1967 ). Happening at Cox Hollow . Reprint Aero Hydraulics Ltd ., London , 1 .
6.
New Scientist Leader
(1968 ). Poisonous Red Tide . New Scientist , June., 574 .
7.
Odum, H.T.
(1968 ). Biological Circuits and the Marine Systems of Texas. Pollution and Marine Ecology . Interscience, Wiley , 99 .
