This collection contains photographs of Atlanta and Georgia Tech from 1953-1954 when Koehler was an exchange student for a year through the Georgia Tech World Student Fund and the Georgia Tech YMCA, earning a master's degree in electrical engineering. Additional photographs are from Oct-Dec 1960 when teaching at Georgia Tech for a year.

The papers include correspondence, research materials, syllabi, and drafts of writing. They are products of Krisitie Macrakis’ work and research pertaining to espionage and Stasi Germany. Also present in the collection are evaluations and activities from courses Macrakis taught at Georgia Tech.

This collection contains visual materials related to sericulture. Although most of the images are general images of silkworm production, machinery, and people associated with sericulture worldwide, there are some images directly related to the Sericulture and Manufacturing Company in Tallulah Falls, Georgia.