Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Late in October 1952, large numbers of waterfowl were found dead upon the water and shores of Storm Lake, Iowa. Several of the dead birds, two semiconscious Franklin gulls and a bucketful of the water which had a thick greenish scum of algae on the surface were submitted to the Iowa Veterinary Diagnostic Laboratory at Ames for investigation. Water-bloom poisoning was suspected as being the cause of death of the birds.
Firkins, George S.
"Toxic Algae Poisoning,"
Iowa State University Veterinarian: Vol. 15
, Article 5.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol15/iss3/5