Otto Neurath: International Picture Language: The First Rules of Isotype (1936)

In the first decades of the twentieth century, Otto Neurath and Gerd Arntz invented the Vienna Method of Pictorial Statistics [Wiener Bildstatistik]. The method was renamed in the late 1930s as ISOTYPE ―I(nternational) S(ystem) O(f) TY(pographic) P(icture) E(ducation) ―and was used in the 1940s and 1950s in the Netherlands, Great Britain, Greece, the USA and the USSR.

Publisher Kegan Paul, Trench, Trubner & Co., London, 1936
117 pages

Commentary: George Pendle (Cabinet).
Wikipedia

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See also Gesellschaft und Wirtschaft: Bildstatistisches Elementarwerk, 1930