1. Stream chemistry and hydrologic pathways during snowmelt in a small watershed adjacent Lake Superior

   • R. Stottlemyer
   • D. Toczydlowski

   OriginalPaper Pages: 177 - 197

2. Biogeochemistry: its origins and development

   • Eville Gorham

   OriginalPaper Pages: 199 - 239

3. A field study on the fate of ¹⁵N-ammonium to demonstrate nitrification of atmospheric ammonium in an acid forest soil

   • A. J. M. Stams
   • H. W. G. Booltink
   • N. van Breemen

   OriginalPaper Pages: 241 - 255

4. Contents volume 13 1991

   Legacy Pages: 261 - 262

5. Author index volume 13 1991

   Legacy Pages: 262 - 262