Edwards, R.W. & Garrod, D.J. Conservation and Productivity of Natural Waters. Symposia of the Zoological Society of London. No. 29. 1st. Pub. Academic Press. 1972
pp. xv, 318 with many figures, graphs and a fold out table. DW. very minor chips at top, o/w. a vg. copy.
£25.00 [Ref: 29223]