1. Derivation of air quality standards on the basis of risk considerations

   • D. Schwela
   • A. Junker

   OriginalPaper Pages: 255 - 268

2. The effect of interaction between the concentration of SO₂ and the relative humidity of air on the survival of the bark-living bioindicator mite Humerobates rostrolamellatus

   • Ph. Lebrun
   • J. M. Jacques
   • G. Wauthy

   OriginalPaper Pages: 269 - 275

3. Effects of methanol on the microflora of an arctic soil

   • R. D. Bryant
   • D. Parkinson

   OriginalPaper Pages: 277 - 290

4. The kinetics of phosphate removal in small alkaline lakes by natural and artificial processes

   • Donald Haumann
   • Thomas D. Waite

   OriginalPaper Pages: 291 - 313

5. Recycling and urban water conservation

   • B. Mörgerli
   • J. Gnieser

   OriginalPaper Pages: 315 - 324

6. A Mercury buffer for toxicity experiments with green algae

   • J. Huisman
   • H. J. G. Ten Hoopen

   OriginalPaper Pages: 325 - 333

7. Atmospheric pollution in Venice, Italy, as indicated by isotopic analyses

   • A. Longinelli
   • M. Bartelloni

   OriginalPaper Pages: 335 - 341

8. Nitrogen and phosphorus in lake Ontario tributary waters

   • W. F. Cowen
   • K. Sirisinha
   • G. Fred Lee

   OriginalPaper Pages: 343 - 350

9. Toxicity of textile waste to some teleost fishes

   • S. R. Verma
   • A. K. Tyagi
   • R. C. Dalela

   OriginalPaper Pages: 351 - 357

10. Comment on ‘transport of pollutants considered from the point of view of a short and medium-range material balance’ by M. Benarie

    • D. H. Lucas
    • B. E. A. Fisher

    OriginalPaper Pages: 359 - 361

11. Reply to comments by Lucas and Fisher

    • Michel Benarie

    OriginalPaper Pages: 363 - 364

12. Book reviews

    • T. Viraraghavan
    • Elmer Robinson

    BookReview Pages: 365 - 373

13. Announcements

    Announcement Pages: 375 - 375