1. Quality of Tigris River passing through Baghdad for irrigation

   • S. M. Mutlak
   • B. M. Salih
   • S. J. Tawfiq

   OriginalPaper Pages: 9 - 16

2. Investigation of Lake Ontario water quality near Port Granby radioactive waste management site

   • R. W. Durham
   • S. R. Joshi

   OriginalPaper Pages: 17 - 26

3. Some aspects of frequency and stability wind roses in a tropical region

   • John K. Ng'ang'a

   OriginalPaper Pages: 27 - 34

4. Metal concentrations in marine sediments from Lebanon

   • J. G. Shiber

   OriginalPaper Pages: 35 - 43

5. A marine algal bioassay method: Results with pesticides and industrial wastes

   • Gerald E. Walsh
   • Shelley V. Alexander

   OriginalPaper Pages: 45 - 55

6. Kepone effects on larval development of mud-crab and blue-crab

   • C. G. Bookhout
   • J. D. Costlow Jr.
   • R. Monroe

   OriginalPaper Pages: 57 - 77

7. Gas migration and vent design at landfill sites

   • M. F. N. Mohsen
   • G. J. Farquhar
   • N. Kouwen

   OriginalPaper Pages: 79 - 97

8. Trace elements in vegetation downwind of a coal-fired power plant

   • Lawrence E. Wangen
   • Frederick B. Turner

   OriginalPaper Pages: 99 - 108

9. Atmosphere-soil mercury distribution: The biotic factor

   • S. M. Siegel
   • B. Z. Siegel
   • G. McMurtry

   OriginalPaper Pages: 109 - 112

10. Movement of nitrogen and carbon from a septic system drainfield

    • J. L. Starr
    • B. L. Sawhney

    OriginalPaper Pages: 113 - 123

11. Book reviews

    • Clarence G. Goluelse
    • G. F. Humphrey
    • T. Viraraghavan

    BookReview Pages: 125 - 128

12. Announcement

    Announcement Pages: 129 - 130