1992 census of manufactures.

Mode of access: Internet.

1987 census of manufactures.

Mode of access: Internet.

Operator's, organizational, direct support, and general support maintenance manual : test set, relay TS-1775/U, NSN 6625-00-064-6096.

"October 1975."

GS and depot maintenance manual : test set, relay TS-836/UGM-1.

"November 1967."

Bibliography of relay literature, 1940-1943; interim report by working group on relay bibliography, Relay subcommittee, AIEE Committee on protective devices ...

"Advance copy, not released for publication."