"7/31/84." Title from PDF file caption (viewed Dec. 31, 2008).
Technical Details:
Mode of access: Internet at the FAA web site. Address as of 12/31/08: http://www.airweb.faa.gov/Regulatory%5Fand%5FGuidance%5FLibrary/rgAdvisoryCircular.nsf/0/3903df1779449159862569e7006da8e3/$FILE/ac61-94.pdf; current access available via PURL.