dcsimg
Please read BHL's Acknowledgment of Harmful Content

Status Update: Internet Archive continues to be offline. As a result, page images are not displaying in BHL.

More information

Sort By:
  1. By: Heidinger, Roy C. - Lewis, William M. (William Madison), - Illinois. Dept. of Energy and Natural Resources.
    Publication info: Springfield, Ill, Illinois Dept. of Energy and Natural Resources, [1983]
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Ammonia  Chlorine  Environmental aspects  Illinois  Sewage  Stream ecology