1. In memoriam

   • Robert W. Howarth

   Legacy Pages: 157 - 157

2. Biogeochemistry of Late Paleozoic North American brachiopods and secular variation of seawater composition

   • Uwe Brand

   OriginalPaper Pages: 159 - 193

3. Ferric iron reduction by Thiobacillus ferrooxidans at extremely low pH-values

   • Woflfgang Sand

   OriginalPaper Pages: 195 - 201

4. Concentration and transport of dissolved and suspended substances in the Orinoco River

   • William M. Lewis Jr.
   • James F. Saunders III

   OriginalPaper Pages: 203 - 240

5. Chemical composition and nutrient loading by precipitation in the Trachypogon savannas of the Orinoco llanos, Venezuela

   • R. Montes
   • J. J. San Jose

   OriginalPaper Pages: 241 - 256

6. Contents volume 7 1989

   Legacy Pages: 257 - 257

7. Index of authors volume 7 1989

   Legacy Pages: 258 - 258