Batchelder, Arthur R. Nutrients and algae in Northeast Colorado lakes / Arthur R. Batchelder and Ralph A. Braden - Washington, D.C. : United States Government Printing Office, 1976 - 49 p. ; 22 cm. Technical Bulletin no. 1515 In cooperation with Colorado University Subjects--Topical Terms: Algology--Northeast ColoradoAlgae Dewey Class. No.: 579.8