1. Smith, ED., Miller, RD and Wu, Y.C, eds. Proceedings: First National Symposium/Workshop on Rotating Biological Contactor Technology. Champion: Pennsylvania University of Pittsburg.
2. Wu, Y.C., Smith, E.D., Miller, R.D. and Opatken, E.J., eds. Proceedings: First International conference on Fixed‐Film Biological Processes. Kings Island, Ohio: University of Pittsburg.
3. Bandy, J.T., Wu, Y.C., Smith, E.D., Basilica, J.V. and Opatken, E.J., eds. 1984. Proceedings: Second International Conference on Fixed‐film biological Processes. 1984, Arlington.
4. Filamentous organisms observed in activated sludge