1. Environmental chemistry of copper in torch lake, Michigan

   • Jose Manuel Lopez
   • G. Fred Lee

   OriginalPaper Pages: 373 - 385

2. A comparative study of methods for the analysis of total lead in soils

   • Roy M. Harrison
   • Duncan P. H. Laxen

   OriginalPaper Pages: 387 - 392

3. Cadmium occurrence in soil organic matter and its availability to wheat seedlings

   • G. Petruzzelli
   • G. Guidi
   • L. Lubrano

   OriginalPaper Pages: 393 - 399

4. Physical and chemical characterization of selected natural apatites in synthetic and natural aqueous solutions

   • E. A. Smith
   • C. I. Mayfield
   • P. T. S. Wong

   OriginalPaper Pages: 401 - 415

5. Effects of dredged spoils on selected microbial activities in lake column simulators

   • E. A. Smith
   • C. I. Mayfield
   • P. T. S. Wong

   OriginalPaper Pages: 417 - 428

6. The interaction of ddt with suspended particles in sea water

   • N. Picer
   • M. Picer
   • P. Strohal

   OriginalPaper Pages: 429 - 440

7. A proposed air quality index for urban areas

   • M. H. Doan
   • C. East

   OriginalPaper Pages: 441 - 451

8. Aqueous release of heavy metals from two sewage sludges

   • R. C. Sidle
   • L. T. Kardos

   OriginalPaper Pages: 453 - 459

9. Effects of mercury and tin on frustular ultrastructure of the marine diatom, Nitzschia liebethrutti

   • Eleanor M. Saboski

   OriginalPaper Pages: 461 - 466

10. Some rate considerations on COD determinations

    • Anton E. Goodwin
    • Dale K. Cabbiness
    • Horacio A. Mottola

    OriginalPaper Pages: 467 - 478

11. Evidence for partial degradation of toxaphene in the aquatic environment

    • G. Fred Lee
    • Robert A. Hughes
    • G. D. Veith

    OriginalPaper Pages: 479 - 484

12. Book reviews

    • John E. Evans
    • Elmer Robinson
    • O. Preining

    BookReview Pages: 485 - 490

13. Announcement

    Announcement Pages: 491 - 491