@book{ Solr-9965398, title = {Routes of the airlines, January 1941, scheduled air services : as published by (copyrighted) the Official Aviation Guide Co., Inc.}, editor = {Official Airline Guides, inc}, address = {Chicago, Illinois}, publisher = {Official Aviation Guide Co., Inc.}, year = {1941}, note = {Covers southern Canada, continental United States, northern Mexico, and Cuba.}, note = {Shows airline routes by carrier.}, }