1. Summary geochemical maps of the Harrison 1⁰?x 2⁰ quadrangle, Arkansas and Missouri [cartographic material] Yale Public content 1989. 2002-06-01T04:00:00Z. 2016-03-28T17:04:12Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by Map Distribution. English. Public. Arkansas and Missouri.