1. Progress of the triangulation between Eastern Missouri and Western Kansas : along or near the 39th parallel. June 30, 1892 Yale Public content 1892. 2013-10-29T16:36:20Z. 2013-11-21T21:26:22Z. U.S. Coast and Geodetic Survey, issuing body. U.S. Coast and Geodetic Survey. English. Public. Middle West.