Search Results       Your search for [subject]Helicopter transportation -- United States returned 1 record.           Urban air traffic and city planning : case study of Los Angeles County, incorporating work by Ali Soliman [and others]. by Branch, Melville Campbell, 1913-; New York: Praeger Pub., 1973. Subject: Regional planning -- Los Angeles Co., Calif; Aeronautics, Commercial -- California -- Los Angeles Co; Helicopter transportation -- United States.          Add to Book Cart Relevance: 17.74%