John Kiljan., "February, 1989.", In cooperation with the Federal Highway Administration., Cover title., Final report., Technical Report number CDOH-DTD-R-89-4., Print version record.
Charles W. Smith., "December 1982.", In cooperation with the Federal Highway Administration., Cover title., Final report. Sept. 1981-June 1982., Report no. CDH-DTP-R-82-10, Print version record.
prepared by the TRG Recreation Subcommittee [and DeLeuw, Cather & Co.] for the Colorado Division of Highways., "November 11, 1976.", Print version record.
