Available also through the Library of Congress Web site as a raster image. "6-60." "For official use only." Includes inset of "Peiping and adjacent area." LC copy stamped on: 354A. LC copy mounted on cloth and laminated. LC copy imperfect: number before date removed.
United States. Central Intelligence Agency
<a rel="nofollow" class="external free" href="https://www.loc.gov/item/2007627279/">https://www.loc.gov/item/2007627279/</a>