@book{ Solr-5792787, title = {Helicopter route chart, Chicago.}, editor = {United States. National Aeronautical Charting Office}, address = {Washington, D.C.}, publisher = {U.S. Dept. of Transportation, Federal Aviation Administration, National Aeronautical Charting Office}, year = {2005}, edition = {Array}, note = {Relief shown by spot heights.}, note = {Shows primary, secondary, and military helicopter routes, includes pictoral graphics of distinctive features that are easily recognizable from the air.}, note = {"Includes airspace amendments effective May 12, 2005 and all other aeronautical data received by March 17, 2005. Topographic data corrected to February 2005."}, note = {Shipping list no. 2005-0140-P.}, note = {"Chart will become obsolete for use in navigation upon publication of the next edition. See dates of latest editions"..}, note = {Inset: Chicago--O'Hare. Scale 1:90,000.}, }