Nelke was a german anthropologist in Berlin who worked on the Asmat and other people of New Guinea. He lived in Belsstrasse/Berlin-Marienfelde and died in 2012.
More information on this anthropologist is welcome
(photo source: http://www.op-marburg.de/var/storage/images/op/op-extra/schueler-lesen-die-op-2015/ein-leben-unter-kannibalen/189300582-1-ger-DE/Ein-Leben-unter-Kannibalen_ArtikelQuer.gif)