[Haskell-beginners] Who discovered map reduce?

In the same vein as the "who discovered the fold operation" thread from last week, I would like to know the same answer for "map". I tried looking it up on wikipedia, but the best line I could find from it is this: "The map function originated in functional programming languages but is today supported (or may be defined) in many procedural, object oriented, and multi-paradigm languages as well: In C++'s Standard Template Library, it is called transform, in C# (3.0)'s LINQ library, it is provided as an extension method called Select." Does anyone have an answer or idea on where I could look? Thanks in advance and sorry if it it's a redundant question. Bryce