(1977). Smithsonian year 1976: Report of the Smithsonian Institution for the period July 1, 1975, through September 30, 1976. Washington: Smithsonian Institution Press.
Παραπομπή Chicago StyleSmithsonian Year 1976: Report of the Smithsonian Institution for the Period July 1, 1975, Through September 30, 1976. Washington: Smithsonian Institution Press, 1977.
Παραπομπή MLASmithsonian Year 1976: Report of the Smithsonian Institution for the Period July 1, 1975, Through September 30, 1976. Washington: Smithsonian Institution Press, 1977.
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