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Electro-Mechanical Research, Inc., correspondence, January 1963-September 1964.
Folders 1-2 Electro-Mechanical Research, Inc., correspondence, July 1966-June 1967.
Folders 3-4 Electro-Mechanical Research, Inc., invoices, 1962-1966.
ELECTRO-MECHANICAL RESEARCH, INC., CORRESPONDENCE, 1961-1967. ARRANGED CHRONOLOGICALLY.
Folders 5-6 Electro-Mechanical Research, Inc., correspondence, February 1961-December 1962.
TECHNICAL DIRECTIVES FILE, 1963-1967. ARRANGED CHRONOLOGICALLY.
Electro-Mechanical Research, Inc., correspondence, October 1964-June 1966.
Smithsonian Astrophysical Observatory Contracts
Folder 40 Amendment 14, 15, 17 to Contract SI-522 between Smithsonian Institution and Electro-Mechanical Research, Inc.
Amendment 16 to contract SI-522 between Smithsonian Inst.and Electro-mechanical Research Inc.