1. The geochemistry of two hard water rivers, the Rhine and the Rhone: Part 1: Presentation and screening of data

   • H. L. Golterman
   • M. L. Meyer

   OriginalPaper Pages: 3 - 10

2. The geochemistry of two hard water rivers, the Rhine and the Rhone. Part 2: The apparent solubility of calcium carbonate

   • H. L. Golterman
   • M. L. Meyer

   OriginalPaper Pages: 11 - 19

3. The geochemistry of two hard water rivers, the Rhine and the Rhone: Part 3: The relations between calcium, bicarbonate, sulphate and pH

   • H. L. Golterman
   • M. L. Meyer

   OriginalPaper Pages: 21 - 24

4. The geochemistry of two hard water rivers, the Rhine and the Rhone, Part 4: The determination of the solubility product of 10750oxy-apatite

   • H. L. Golterman
   • M. L. Meyer

   OriginalPaper Pages: 25 - 29

5. Precision and accuracy of the determination of the ionic product of 10750oxy-apatite

   • R. S. Clymo
   • H. L. Golterman

   OriginalPaper Pages: 31 - 34

6. Comparative bioenergetics of permanent and temporary pond populations of the freshwater clam, Musculium partumeium (Say)

   • Albert J. Burky
   • Daniel J. Hornbach
   • C. M. Way

   OriginalPaper Pages: 35 - 48

7. Effect of light intensity on the growth of Azolla pinnata R. Brown at Ranchi, India

   • Amarjeet Singh
   • O. N. Srivastava

   OriginalPaper Pages: 49 - 52

8. Compensation effect of phytoplankton on nutrients from a sewage outfall in summer

   • N. Friligos

   OriginalPaper Pages: 53 - 58

9. Contribution of bream, Abramis brama (L.), to the nutrient dynamics of Lake Balaton

   • Tadeusz Penczak
   • István Tátrai

   OriginalPaper Pages: 59 - 64

10. Interactions between period of exposure, grazing and crop growth rate of Cynodon dactylon (L.) Pers. in seasonally flooded areas of the Pongolo River floodplain

    • H. D. Furness
    • C. M. Breen

    OriginalPaper Pages: 65 - 73

11. Daphnia (Ctenodaphnia) brooksi (Crustacea: Cladocera), a new species from eastern Utah

    • Stanley I. Dodson

    OriginalPaper Pages: 75 - 79

12. Environmental conditions and phytoplankton in the Mwenda River, a small intermittent river flowing into Lake Kariba

    • R. D. King
    • D. P. Thomas

    OriginalPaper Pages: 81 - 89

13. A new quantitative grab for sampling benthos

    • Raymond E. Grizzle
    • William E. Stegner

    OriginalPaper Pages: 91 - 95

14. Erratum

    Erratum Pages: 96 - 96