Johnson, Jerry M.Odlaug, Theron O.Olson, Thedore A.Ruschmeyer, Orlando R.2010-07-232010-07-231970-06Johnson, Jerry M. Odlaug, Theron O. Olson, Theodore A. Ruschmeyer, Orlando R. 1970. Potential Productivity of Fresh Water Environments as Determined by an Algal Bioassay Tehnique. Water Resources Research Center.https://hdl.handle.net/11299/92334en-USNewsletter or Bulletin