Gerd Arntz (1900–1988) is best known for his work with Otto Neurath and his development of the ISOTYPE method of depicting social, technological, biographical, and historical connections in pictorial form. See more of his work here.
References
Annink, Ed and Max Bruinsma, ed. Gerd Arntz: Graphic Designer. (Rotterdam: 010 Publishers, 2010). 275.
www.gerdarntz.com. File number GMDH02_00114