Below you can find links to original documents:
N6321C Radio Licence - issued March 25, 1964 to Dooley
N6321C Certificate of Aircraft Registration - issued June 23, 1967 to Dooley
Page from Dooley maintenance manual - January 7, 1968
Dooley Line Check form (FAR 121)
Dooley pre-flight checklist - July 20, 1968
N6321C Certificate of Aircraft Registration - issued February 12, 1970 to Denver Ports of Call
Ports of Call bill of sale for $1000 to Garwood Andresen - August 17, 1971
Invoice from Frohlick Crane Services for movement of DC7 - October 6, 1971