@book{ Solr-10135179, title = {Helicopter route chart, Chicago.}, editor = {United States. Federal Aviation Administration}, address = {Washington, D.C.}, publisher = {Federal Aviation Administration}, year = {2013}, edition = {Array}, note = {Relief shown by spot heights.}, note = {Shows primary, secondary, and military helicopter routes.}, note = {Includes pictorial graphics of distinctive features that are easily recognizable from the air.}, note = {"Includes airspace amendments effective 17 Oct 2013 and all other aeronautical data received by 22 Aug 2013."}, note = {Shipping list no. 2014-0038-P.}, note = {"Chart will become obsolete for use in navigation upon publication of the next edition. See dates of latest editions"..}, note = {Includes text and location map.}, note = {Map on verso: Chicago--O'Hare. Scale 1:90,000.}, note = {Originally folded to 26 x 13 cm.}, }