title: Celebrating 50 Years of Publication!
authors.affiliation: Environmental Research and Information Analysts, Dubuque, IA, 52001, USA. dcall@enviro-analysts.com.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Call
authors.affiliation: Gorsuch Environmental Management Services, Webster, NY, 14580, USA.
authors.forename: Joseph W
authors.initials: JW
authors.lastname: Gorsuch