TM 11-5820-357-10.pdf  Operator's Manual, Radio Receiver R-390/URR.  16 January 1961.
TM 11-5820-357-20.pdf  Organizational Maintenance Manual, Radio Receiver R-390/URR.  23 March 1961.
TM 11-5820-357-35.pdf  Field and Depot Maintenance Manual, Radio Receiver R-390/URR.  9 March 1962.

These files are made available with the compliments of August Johnson, KG7BZ.