20.O29 [Mazarin, Augereau, and Gamme Crossroads] December 26, 1917
Covers an area equivalent to portions of squares O29, and 30 on the corresponding WWI map sheet 20. Negative roll 9B, photo 220. Annotations on recto: north arrow pointing slightly to the right of straight up. WWI Aerial Photograph Collection: Box 1, Envelope 81.