found: Einführung in die Didaktik des altsprachlichen Unterrichts, 1982:title page (Rainer Nickel) back cover (born 1940; teaches and writes on classical languages)
found: LC data base, October 17, 1986(hdg.: Nickel, Rainer, 1940- )
found: German Wikipedia, viewed June 29, 2020(Rainer Nickel; born July 10, 1940, in Korbach; German classicist and pedagogue; obtained his doctorate at the Freie Universität Berlin in 1970; he taught at the Gymnasium level (upper-level secondary school) and was active in the area of teacher training; he taught pedagogy of classical languages at the Universität Göttingen from 1999 to 2004; since 2008, he has taught at the Universität Marburg)