R. Walter

The profundal region
Walter, R. A., R.E. Moeller, David L. Strayer, and Jonathan J. Cole. 1985. “The Profundal Region”. In G. E. Likens (ed.). An Ecosystem Approach to Aquatic Ecology: Mirror Lake and Its Environment, 317-22. Springer-Verlag New York, Inc.
The littoral region
Moeller, R.E., R. A. Walter, David L. Strayer, and B.J. Peterson. 1985. “The Littoral Region”. In G. E. Likens (ed.). An Ecosystem Approach to Aquatic Ecology: Mirror Lake and Its Environment, 311-17. Springer-Verlag New York, Inc.