The Technical Reference Files comprise an artificial collection that currently contains 1,900 cubic feet of aviation and space related materials, organized in 22 subject series. File materials include photographs, press releases, clippings, correspondence, reports, and brochures, on individuals, organizations, events, and objects.
An outstanding scholar in the field of Iranian studies, Ernst Herzfeld (1879--1948) explored all phases of Near Eastern culture from the prehistoric period to Islamic times. This collection documents Herzfeld's excavations at Samarra, Persepolis, Pasargadae, and Aleppo and includes correspondence; field notebooks; drawings; sketchbooks; inventories of objects; "squeeze" copies of architectural details; and photographs.